HDJ81 oil type (and change intervals)??

allofthisforyou · 06-16-08, 12:05 PM

Hi guys, I recently purchased a 1992 Toyota Land Cruiser Turbo Diesel (HDJ81) without an owners manual.

Because it is getting higher fuel consumption then I expected (16L/100km) I am currently trying to sell it. In the mean time, I still have to make sure that the car is properly maintained and I have started with an oil, oil filter, and air filter change. Because the guy at the Toyota dealership sold me a filter that was too small for the engine, my LC is currently sitting in my driveway with a punctured oil filter and a drained oil pan. I am planning on adding fresh oil in the next couple of hours (I have 10L of MotoMaster 10W-30 diesel oil sitting in my garage) but I am just wondering whether I would be better off adding 15W-40 to this engine (I haven't been able to find this information, regarding an HDJ81, in any previous posts so if anyone knows what the "recommended" oil to be used is that would be greatly appreciated).

I live in Vancouver, B.C. (Canada) and the highest temperature that we get in the summer is about 35 or 36 deg. Celcius, for a day or two...

I purchased the 10W-30 oil because I read, on this site, that lower viscosity oil is supposed to give better gas mileage and lubrication, with the trade-off being that the engine ends up running louder. From the chart on this page: http://forum.ih8mud.com/80-series-tech/220628-oil.html (post #24) it seems that it should be okay to use 10W-30, but if you guys could let me know for sure, within the next few hours, that would be great.

Also, does anyone know how often the oil, and air filter, should be changed?? I changed the air filter on Saturday, and am going to change the oil today, but without a manual or the ability to read Japanese, I'm not sure how often I should change these two things (is it: oil 5,000 km/3 months and air filter 10,000 km/6 months??).

If my gas mileage gets better within a month of this oil/air filter change I may still keep this vehicle (it currently has 35" tires on it so I'm not expecting it to get the 7 L/100 km @ 60 km/hr and 10 L/100 km @ 100 km/hr that it is "supposed" to get, but if I can get it down to about 11 L/100 km around the city then I figure it would use the same amount of fuel as a Suzuki Sidekick, with bigger tires on it, and I would be happy...)

Anyways, thanks in advance for any advice,
Rob

Tapage · 06-16-08, 05:56 PM

Rob ..

Those 1HD-T engines are around 24 km/gal .. I'm using 20W-50 down here in Panamá, but we have a little diferent wheathers .. You should post this question in the Diesel Section with better results from Canadian fellows ..

BTW I try to make my oil changes as much as 3000 km .. prefeer with 2500km and the air filter it all depends on your driving conditions .. 5000 km it's the recomended number .. as same as the fuel filter ..

romey · 06-16-08, 08:18 PM

shell rotella diesel oil from canadian tire should do the trick, every 5k. guys using the synthetic shell are changing every 10K, same with amsoil.

wix and donaldson also have filters that fit.

more parts here: http://forum.ih8mud.com/intl-jdm-own...rt-thread.html

16L/100Kms?! just b/c of the bigger tires? have you tried running a good diesel fuel additive llike gen 49 from powerup, or flashlube? or even howes?

hope your mileage improves, g'luck!

allofthisforyou · 06-17-08, 01:01 AM

Thanks guys,

24km/gal (=~ 16 L/100 km) is more than I can afford right now. I saw a couple of sites that said that these things use between 7-10 L/100 km, or get 10-13 km/L, depending on the driving speed, and apparently they come stock with 31X10.5" tires so I was exepecting maybe a 1-2 L/100 km difference due to tire size (35X10.5")... I was reading a couple of posts on this site and a couple of guys were reporting about 12 L/100 km in these vechicles and saying that there is "something wrong" if it they are using 16+ L/100 km so I am still hoping that I may be able to bring down the fuel consumption in this thing.

The tires are a little low right now (32-36 psi last time I checked) so that may be part of it (I read in the "tire section" of this site that LT 35's should be inflated to between 36-40 psi (+5-8 psi for a truck with "extra weight") so I will fill all four tires to 42 psi tomorrow (I have a bull bar, winch, and rear bumper on the thing) and see if that changes anything... I was strongly encouraged to change the oil and give it about a month (because the thing was on a ship for a while) so I have done (and will do) that... I have also changed the air filter because it was more than just a little clogged (red spongy material was completly black/oily on one side)... Since the truck has 89,000 km on it right now I should probably change the timing belt soon as well (apparently fuel consumption begins to increase when the timing belt needs replacing, and they are supposed to be changed every 100,000 km). If, after doing the above three things and waiting a month, I can get the consumption down to 11-12 L/100 km I will try the diesel fuel additive as well... My main goal right now is to get the consumption down to 11 L/100 km as a result of "regular maintenance" and then I can try things like adding fuel additives, decreasing the fuel intake, and buy a user's manual that I can actually read

Anyways, thanks for all the info. If anyone else has any recommendations for what kind of oil (10W-30, 15W-40, etc.) to be using in this kind of vechicle in a relatively mild climate (lows of -5degC, highs of 35degC), they would be greatly appreciated.

Thanks,
Rob

hectorladron · 06-17-08, 02:53 AM

hello, I've been running 15w-40 chevron dello 400 in mine. i live in victoria. hope it helps.

Sarmajor · 06-17-08, 03:21 AM

first of all the HDJ81 comes from the factory with 275/75R16 tyres at least from mid 92 anyway. These equate to 32 inch tyres. So you are running 35 inch tyres thats a 3 inch increase in diameter. Around a 10% increase. You have to expect a drop in mileage just from that. It takes horsepower just to roll these buggers and of course you still want to drive at the same speed. Power = fuel.

Down in NZ you are limited to a 5% increase in tyre size unles you have a LVV Certificate (Low Volume Vehicle) for the modification. This is mostly related to certifying the braking systems ability to stop he vehicle satisfactorily with larger tyres in the case of larger than 5% tyres.

Cheers

Hedley

Tapage · 06-17-08, 10:58 AM

We are not only talking about 10% more tire diameter, also are more tire weight, more friction due to more wide tire and with lift bumpers .. you are not ( and even close ) to get factory milleage ..

The aerodinamics can kill you with lift and bumpers ..

96r50 · 06-17-08, 12:36 PM

Are you taking into account the bigger tires when you calculate your mileage? With the bigger tires your odometer/speedometer is off, so your mileage numbers will be off too.

As for oil, Parts Source/Canadian Tire sell the Rotella 5w40 (syn) and 15w40, and Walmart sells Mobil 1 5w40 (syn)

dieseldan · 06-17-08, 12:46 PM

Quote:

Originally Posted by 96r50

With the bigger tires your odometer/speedometer is off, so your mileage numbers will be off too.

That was my question also - I switched to 35's and after the first fill thought I had a dramitic drop in mileage but after adjusting for tire size I'm still sitting at 20-21 mpg highway.

If you're selling then any synthetic 15-40 should do - if keeping I recommend the extra bucks for the Royal Purple - I've noticed that since switching I'm not burning any oil between changes whereas before I'd be topping up a litre or so every 3-4,000km.

I have part numbers for filters and such if you need - send a pm.

Anyway good luck with the sale if you go that way..

allofthisforyou · 06-17-08, 08:25 PM

Hey guys, thanks again... I ended up adding 10L of MotoMaster 10W-30 so I won't be changing it for another 5000 km or so... I've also filled all four tires to 41 psi (since I have removed the rear mounted spare)... Since I'm am going to sell this truck in a month and a half (if the fuel consumption doesn't decrease) I am not too worried about using the "best oil" right now but if you guys would like to keep posting on what type of oil you have found works best in this type of engine (1HD-T) I will definately take it into consideration if I end up keeping this thing...

I got the stock tire size from RISING SUN IMPORTS and it says that the stock tire size is 31X10.5", but if it's 32" that's good to know...

Like I said, I wasn't expecting the mileage to be exactly the same as the EPA but a 9 L/100 km difference in fuel consumption is quite a bit... I realize that power = fuel, and that a larger diameter tire requires more torque (and thus more power needs to be generated) in order to be rotated, but I was expecting maybe a 1-2 L/100 km increase in fuel consumption due to tire size (3" increase in diameter + weight)... I did not consider that the aerodynamics would suffer so badly due to the lift, nor have I considered how much more fuel is required to haul around the winch + bull bar...

I definately haven't adjusted the odometer for tire size (which is apparently off by 7.3% when 32's have been replaced by 35's (according to Tire size calculator)) and I am assuming that the odometer hasn't been corrected in this truck so I will add 7.3% (36.5km for every 500km) to the odo. reading before calculating the fuel consumption next time...

Thanks for offering part numbers dieseldan, I'll let you know if I ever need any...

Thanks, as well, to everyone else for all the advice,
Rob

T.Stanford · 06-17-08, 11:01 PM

Where did you read these trucks go 100 km on 7 litres of fuel? My god, even the most optimistic claims are nowhere near that... it's a 6000 pound vehicle. The best I have ever got was (@90-100kph) 11-12 L/100km on the highway. My BJ60 gets about 10-11 L /100km on the highway routinely. 16L/100km seems quite high but I can see that if you drive with your "foot in it", cruise at high speeds(<120km), or the bulk of your driving is start/go that you can be up in that range. Cheers, Tony

bruff · 06-17-08, 11:31 PM

I'm getting 450-575 kms per tank of fuel. I am hoping that will change slightly when I get my injectors and pump timing worked over.

romey · 06-17-08, 11:46 PM

Quote:

Originally Posted by bruff

I'm getting 450-575 kms per tank of fuel. I am hoping that will change slightly when I get my injectors and pump timing worked over.

you guys are scaring me from getting bigger tires and adding things! with stock tires, suspension, and exhaust i've hit 500km to half the tank many times on mostly highway driving...

would a 3" exhaust and uppin the boost to 14 psi have a negative effect on mileage?? if the rig was ran the same way, easy on the throttle....? how 'bout with an intercooler??

mac · 06-18-08, 12:28 AM

Quote:

Originally Posted by romey

you guys are scaring me from getting bigger tires and adding things! with stock tires, suspension, and exhaust i've hit 500km to half the tank many times on mostly highway driving...

would a 3" exhaust and uppin the boost to 14 psi have a negative effect on mileage?? if the rig was ran the same way, easy on the throttle....? how 'bout with an intercooler??

You could potentionally help your economy with those mods- not by much. Definitely won't hurt economy.

I run 33"s and routinely get over 600kmw/tank and at times 700+ on the highway. I have new injectors and drive like a sane man(mostly).

Tire pressure, air filter, clean oil- these things will all affect your mileage significantly. Timing belt will not. In addition, you should look into whether or not your fuel screw has been played with- if it's been turned up your mileage will suffer. Black and oily air filter at 89k kms?- I'd be questioning the authenticity of the mileage.

This thread should maybe find it's way over to the diesel section...

jinzuke · 06-18-08, 01:10 AM

I get 450 to 550kms per tank. I would just like to point out that shell rotella diesel oil is way better then MotoMaster 10W-30, which I hope was motomaster 10w-40 diesel oil. The price is not to bad Wall mart has it on sale from time to time. The next thing is have you checked your bottom end bearings. Good luck in you quest for better km per l and keep us posted.

83bj60 · 06-18-08, 05:26 AM

Hoping to reach 10l/100 at 100kph is unrealistic. For that you need to reduce to 85 kph or so, and be very, very gentle on the pedal. Average is 12l/100 summer, 14 in winter, economy highway only at 85 you can reach 10 and even, if you're lucky, 9.5

But 7l/100? I'm sorry, but these figures have no basis in reality.

BTW your 35" are a full 4 inches above stock, or about 12% more distance, so your 16l/100 is actually closer to 14l/100, which is pretty much normal if you're stop and go and go routinely faster than 110 kph on the highway.

As for your Motomaster 10W30, worst choice you can possibly make. I hope you don't intend to run at 120kph in 30 degree weather with it. I certainly wouldn't want to be the one buying that truck in a couple of months. Rotella 15W40 is the minimum, and if you can find it, the synthetic version is even better.

Finally, don't skimp on the oil filter. You want the OEM filter, it's dual element, vastly superior to standard oil filters. And replace thoses BEBs!

Sorry for sounding harsh and don't take it personnally, but you sound pretty casual about your care for that truck. Read on about the BEBs and the oil, its very important with that model.

romey · 06-18-08, 09:02 AM

thanks mac! good to know. whew!

yeah, looks like 11-13L/100k is the realistic average for these rigs...10L on a good day being light on the pedal..IF you ran the tank consistently below 100km/hr and no stop and go, ON stock wheels...

+1 on using rotella at the very least and OEM filters.

Glenn-BJ74 · 06-18-08, 11:51 AM

With larger diameter tires you need you correct your speedo reading to get an accurate mileage reading.

My GPS corrected reading is that I am going 14.4% further than indicated. In other words I am traveling 14.4 % farther than indicated on the 33's on my BJ74 (I am getting 25.75 mpg(imperial).

Borrow a GPS and see what speed your speedo says when traveling ate 100 kph as indicated by the GPS. Even unmodified truck speedos are not that accurate. Calculating it from tire diameters is not as good as actual field measurements.

Tapage · 06-18-08, 12:23 PM

Mobil 1 make 5W-50 that looks to me the great choice ..

allofthisforyou · 06-19-08, 02:03 AM

Thanks again guys,

T.Stanford, I got the 7 L/100 km figure from RISING SUN IMPORTS and Toyota Land Cruiser HDJ81 VX Limited 4.2 L Turbo Diesel | Buy Exclusive JDM Cars from Japan to Canada . I drove it fairly lightly for the first couple of weeks (tried keeping the RPMs down, etc.) so I don't think that the 16+L/100km is due to manic driving...

I had some doubts about the authenticity of mileage mac (the interior has quite a bit more wear then I expected for a vechicle with 89,000 km on it (leather peeling on the shifter, etc.)) but I try giving people the benefit of the doubt.

Like I said before, if I can get the fuel economy down to 11 L/100km I will be very happy (a stock Suzuki Sidekick is supposed to use 11.8 L/100 km in the city and 10 L/100km on the highway and I would obviously prefer to be driving a LC over a Sidekick).

I'm going to give it a month now that the oil, oil filter (bought from Toyota dealership), and air filter, have been changed, and the tires are properly inflated, and see if there is any change in the consumption (at least a 2 L/100 km decrease in consumption). I'll try finding the fuel screw as well but I have no idea where that is located (haven't been able to find it in the Toyota 1HD-T Repair Manual either)...

I've read about the BEBs jinzuke and I will look into them (as well as put in a working stereo, and change the timing belt) if this thing finally starts getting respectable mileage.

As far as sounding casual about the care for the truck, 83bj60, it's most likely because I am trying to do the bare minimum that I need to do to keep this truck properly maintained/prevent major mechanical failure. Like I said, I simply can't afford a vechicle that uses this much fuel (I would have bought a '95 Toyota Pickup for half the price if could). If this thing was using 11 L/100 km all around I would take care of it like a child but I'm not willing to invest a lot of money into something that I may have to sell soon.

Could you elaborate on why the "Motomaster 10W30, [is the] worst choice you can possibly make??" 83bj60?? I haven't been able to find too much information on this in previous posts but the recommend visocity chart (in the repair manual, and http://forum.ih8mud.com/80-series-tech/220628-oil.html (post #24)) suggests that 10W-30 is okay for temperatures between 0 and 38 deg Celcius. Like I said, I don't have a users manual for this truck, and I haven't been able to find any recommendations in the engine compartment (not surprisingly), so any information on the oil weight I should be using would be greatly appreciated (a reason would be nice as well, since the repair manual seems to be saying that 10W-30 should be okay for the temparature (I'm assuming this is outdoor temp.) range that I am going to be expecting). I'll keep researching this topic but I just want to make sure my engine isn't going to die in the meantime.

As far as the true mileage correction, Glenn-BJ74, I will try to do that on the highway this weekend (with timers, km markers (if they have these on our highways), etc.).

Thanks again, and I look forward to reading any other insights about optimal oil weight for 20-34 deg Celcius weather,
Rob

mac · 06-19-08, 11:08 AM

I hope that 10w30 has "CI" written on the bottle. If not, it's for a gas engine.

Oh, and please do all of us RHD owners a favour- don't sell your truck dirt cheap please. Too many people are jumping on the RHD Cruiser bandwagon without a real understanding of what these rigs are all about and then unloading them cheap.

romey · 06-19-08, 12:00 PM

Quote:

Originally Posted by mac

I hope that 10w30 has "CI" written on the bottle. If not, it's for a gas engine.

Oh, and please do all of us RHD owners a favour- don't sell your truck dirt cheap please. Too many people are jumping on the RHD Cruiser bandwagon without a real understanding of what these rigs are all about and then unloading them cheap.

+1.

btw allthisforyou, if the timing belt was done in japan, say at 100K kms or at around 15 years, then those guys would've stamped a sticker stating date/mileage of the t-belt replacement...at 89K maybe it hasn't been done yet, or it was done earlier, if it was a roll back, maybe it's been done and they peeled this sticker off (so it doesn't show 100K and they claim it has 89K), which means you might have a mark from where that sticker used to be...on top of the plastic cover/housing the t-belt right infront of the motor. (check www.jdmparts.ca on their LC's and one of them has the t-belt changed with pic of sticker, you'll see what i mean, this is pretty standard procedure as far as i know in japan..good way to investigate some anyway. here: http://www.jdmparts.ca/prodimages/06359-8.JPG )

if you're gonna use motomaster, at least use their diesel oil, or just get the shell rotella T 15/40 diesel oil.

83bj60 · 06-19-08, 12:40 PM

Quote: