Accidental oil change record - 13,290 miles on Rotella synthetic

[khoi911]

Customer went 9000 miles between intervals and used a different brand of synthetic oil every time

Why would switching synthetics have any consequence?

 

[VacMan]

My last Blackstone report suggested that I push my intervals to 12,000 and I'm running conventional oil, so I wouldn't worry about going further on synthetic




That being said, I think it has more to do with the fact that the 1FZ is very easy on oil when compared to other engines

Here's a Honda Odyssey motor I tore down after the cam gear snapped off from seizing up







Customer went 9000 miles between intervals and used a different brand of synthetic oil every time

Wow, crazy pics. Thanks for showing how truly ugly sludge buildup can get.

 

[98 SNAKE EATER]

Why would switching synthetics have any consequence?

Different manufacturers often use additives that aren't always compatible and can actually produce sludge

It's always best to choose one brand (whatever it may be) and stick with it for the life of the engine

*sent from my android string cup*

 

[khoi911]

Different manufacturers often use additives that aren't always compatible and can actually produce sludge

It's always best to choose one brand (whatever it may be) and stick with it for the life of the engine

*sent from my android string cup*

I thought synthetics is suppose to clean out sludge. If indeed switching to diff oils over a lifetime of an engine produces sludge then everyone here is screwed. Most 80s have had multiple owners and what are the chances that these owners all use the same oil?

 

[firetruck41]

Different manufacturers often use additives that aren't always compatible and can actually produce sludge

It's always best to choose one brand (whatever it may be) and stick with it for the life of the engine

*sent from my android string cup*

unconvinced

Sent from my DROIDX using Forum Runner

 

[duggy]

Same. I've used many types of oils in my cars and have never had an issue.

 

[98 SNAKE EATER]

I thought synthetics is suppose to clean out sludge. If indeed switching to diff oils over a lifetime of an engine produces sludge then everyone here is screwed. Most 80s have had multiple owners and what are the chances that these owners all use the same oil?

This topic has been hashed out repeatedly on the oil forums over the last decade

Multiple reports (including many of my own on numerous vehicles) suggest better TBN results when running 1 brand of oil (whether it be conventional or synthetic)

I got my 80 with 81,xxx miles and the first TBN report @ 103,500 miles wasn't nearly as good as the one @ 250,500 miles

I've stuck with 1 brand since I had her and each report gets better and better with longer intervals

I'm currently at 282,xxx miles on the original HG and I'm willing to bet my next report @ 300,000 miles will be even better

Not saying switching will kill your engine (especially a 1FZ that will probably run fine on vegetable oil), but constantly switching oil brands that may have incompatible additives can very well do more harm than good

 

[IdahoDoug]

I am unconvinced that there is any compatibility issue with various oil additives in motor oil. I don't know the qualifications of people who are debating this on oil forums but I have seen some completely baseless discussions reach conclusions on the internet that have no connection with reality. So, might I suggest that those suggesting there is an issue are not as well informed as they suggest?

I used to develop vehicles for GM and for Lexus and Toyota and was also Worldwide Powertrain Planner for GM. We used to routinely test oils for our engines in all manner of lab and real world conditions and I've never heard of this.

On the common sense side of things, if you do an oil change you are swapping out perhaps 95% of the old oil and the additives are such a small % of the oil volume itself, we are talking about remaining additive quantities that would fit in this period. And if a mfr were using an additive that in that small a quantity could cause issues, then it would be an incredibly potent and incompatible substance indeed. No way the Petroleum Engineers and SAE standards would allow an oil to be approved with it. So, I'm trying to respectfully say there is no way what the people on the forum contend is true. Absolutely no way residuals from one oil cause any issues with another oil. The whole point of the oil approval process is to ensure this incompatibility cannot take place, and that oils are uniform.

So get back on those forums and tell them they are full of BS!! Heh...

DougM

 

[Tools R Us]

^^^ Yep.

Automotive fluids are so tightly regulated now days that they are more the same than ever. They all have virtually the same ingredients, just slightly differing ratios.

 

[98 SNAKE EATER]

I am unconvinced that there is any compatibility issue with various oil additives in motor oil. I don't know the qualifications of people who are debating this on oil forums but I have seen some completely baseless discussions reach conclusions on the internet that have no connection with reality. So, might I suggest that those suggesting there is an issue are not as well informed as they suggest?

I used to develop vehicles for GM and for Lexus and Toyota and was also Worldwide Powertrain Planner for GM. We used to routinely test oils for our engines in all manner of lab and real world conditions and I've never heard of this.

On the common sense side of things, if you do an oil change you are swapping out perhaps 95% of the old oil and the additives are such a small % of the oil volume itself, we are talking about remaining additive quantities that would fit in this period. And if a mfr were using an additive that in that small a quantity could cause issues, then it would be an incredibly potent and incompatible substance indeed. No way the Petroleum Engineers and SAE standards would allow an oil to be approved with it. So, I'm trying to respectfully say there is no way what the people on the forum contend is true. Absolutely no way residuals from one oil cause any issues with another oil. The whole point of the oil approval process is to ensure this incompatibility cannot take place, and that oils are uniform.

So get back on those forums and tell them they are full of BS!! Heh...

DougM

Touché sir

I'm not an expert, nor do I claim to be, so take whatever I say with a grain of salt

I just go by what I've learned from personal experience, test results and the suggestions of others, including Blackstone and STLE

 

[js93cruiser]

Your right Idaho, it's an old wise tale, that might have been true back in the day when oils weren't nearly sophisticated as they are today, oils today are leaps and bounds better than before

 

[rodmanfzj80]

Subscribing to see the results of your report. I predict it'll be just fine. In the BMW world 15k oil changes are the recommended process even in high performance applications like my m5. Most enthusiasts don't adhere to that...I change mine every 5k or so...but I doubt that a quality synthetic will be destroyed in 13k.

Sent from my DROID BIONIC using IH8MUD

Holy s..t, good to see another M5'r here. I'm also in M5board. I've seen you around in there too. just got me an 80 in May.

on topic, I change mine every 7,500 on the BMW. but once, when i wanted to see how long until the car told me when, I changed it at almost 16k.

 

[rodmanfzj80]

Here's a Honda Odyssey motor I tore down after the cam gear snapped off from seizing up







Customer went 9000 miles between intervals and used a different brand of synthetic oil every time

That looks more like he just added oil when needed and never changed it. holy crap!!!!!!!!!!!!!!!:whoops:

 

[2fpower]

well, not 80 specific, but my first toyota was a 77 toyota corolla wagon with a 2tc 1.6 motor. It came mustard yellow and we painted it catchup red, so we called it the hot dog. My folks passed the car to my sister then to me. Had over 100k on the motor when I got it. At 120k I took an auto shop class and decided to change the oil. We had no recollection of ever changing the oil, so likely 60k between changes.

I pulled the oil drain plug and a little trickle of oil came out. So, I put the plug back in. Checked the dipstick and it was full. So, heated the motor up and then tried to drain it again.. that time it worked.

Drove it for several more years, then sold it to a family friend. Last I knew it had almost 200k miles.

I am a very big supporter of synthetics now and am religious about changing oil timely; however, this taught me how well built Toyota motors were.

 

[Black Rhino 13]

I just ordered up my free Blackstone kit. Thanks guys! I've got 20K on the LC. It's at 145K. I ran M1 the first 15K and now I'm on my first run of T6 5W40 at 4000 miles. Interested to see my lab report whenever I do the oil change. All your expertise and knowledge sharing is greatly appreciated.

 

[80t0ylc]

Well, Doug, what's the results of the Blackstone analysis? Either I'm going blind or missed it somehow - it's been almost 3 months since you posted this thread.