Synthetic Oil: Which Weight/Grade to use

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since you live in a warm climate like me and my FIona. I would run the 15w50 since it seems to be the thickest thing they offer.

I personally run Royal Purple 20w50 in my truck year round which is also a full synthetic (and i personally find it to be far superior to mobil 1 seen many independent bearing load test and royal purple was #1 the amsoil then all the others. no i do not work for them i have just seen the test and used dif oils on many dif vehicles and the royal purple has performed the best in all of them)
 
since you live in a warm climate like me and my FIona. I would run the 15w50 since it seems to be the thickest thing they offer.

I personally run Royal Purple 20w50 in my truck year round which is also a full synthetic (and i personally find it to be far superior to mobil 1 seen many independent bearing load test and royal purple was #1 the amsoil then all the others. no i do not work for them i have just seen the test and used dif oils on many dif vehicles and the royal purple has performed the best in all of them)

I've heard a lot of Royal Purple. I'll check it out!


20W-50, eh? Alright, will look into it.

Thanks
 
I use 20w-50 amsoil syn... If you decided to go asmoil, let me know I can get you a good deal.
 
I've heard a lot of Royal Purple. I'll check it out!


20W-50, eh? Alright, will look into it.

Thanks

no problem man. it is becoming more and more available every day too. wich is always good news. i know here o'reily, pep boys, and napa all sell it to name a few.
 
since you live in a warm climate like me and my FIona. I would run the 15w50 since it seems to be the thickest thing they offer.

I personally run Royal Purple 20w50 in my truck year round which is also a full synthetic (and i personally find it to be far superior to mobil 1 seen many independent bearing load test and royal purple was #1 the amsoil then all the others. no i do not work for them i have just seen the test and used dif oils on many dif vehicles and the royal purple has performed the best in all of them)

Just got off RP's website.

Pretty Impressive but I wonder just how much better it is than Mobil 1. I know it's more expensive, but I wouldn't mind a dollar more a quart if it is that much better.

I'll keep researching it but so far, pretty neat stuff.
 
oh yea when i switch to RP in both my 96 camaro and my 2000 S-10 i saw an increase (very very small but noticable when you watch it like i do) in mpg.
 
Oh man, just got off this site...I feel overwhelmed with Oil info!

From reading some of the posts, I'm gonna stick to Mobil 1.

Many have said that Royal Purple shears too easy and that ain't good!
 
Gotta remember what we are running here. I run Mobile 1 primarily because of the reduced friction / wear at start-up, stability when really hot (should the situation arise), and longer service intervals.

Otherwise we are talkin' about engines that rarely run above 3500rpm. Piston speeds are really low and oils designed for high RPM engines (like the synthetics we are looking at here) aren't going to be taken to their design limits.

Synthetics? good stuff, but Mobil 1 at $14/quart in Baja? Maybe quality petroleum based regular oil, careful warm-up with frequent changing is more appropriate in certain applications!
 
Why 20-50? Thought that was only for overhead cam engines? Why not just a 10-40? Even in So. Cal ?
 
Gotta remember what we are running here. I run Mobile 1 primarily because of the reduced friction / wear at start-up, stability when really hot (should the situation arise), and longer service intervals.

Otherwise we are talkin' about engines that rarely run above 3500rpm. Piston speeds are really low and oils designed for high RPM engines (like the synthetics we are looking at here) aren't going to be taken to their design limits.

Synthetics? good stuff, but Mobil 1 at $14/quart in Baja? Maybe quality petroleum based regular oil, careful warm-up with frequent changing is more appropriate in certain applications!


I could not agree more. I run synthetics in cars/trucks I buy new. In oldsters like an FJ60, run on mineral oil all it's life, I see no advantage to synthetics late in the engine life. I do run the Rotella Syn in the winter, which is sort of a fake "synthetic", but don't go overboard here. It's an FJ60 afterall, and it doesn't really care what oil you run. Here is a list of good and cost effective choices:

Chevron Delo 15w-40 (6 gallons for $40 at Costco)
Chevron Supreme 20w-50 (Often $.49/quart on sale at Kragan/Checker)
Rotella 15w-40
Rotella Syn 5w-40 ( a bit more $$, but good for winter starts)

Mobil1, while not a cost effective choice, is great stuff. Run it if you have money to burn. Royal Purple, Amsoil, Redline to me are more hype than substance. I'm sure they are fine, but worth the $$???? The law of diminishing returns applies here.
 
where the cam sits would not have anything to do with the weight of oil that you would use...

Example. a brand new honda civic with a dohc (dual over head cam) requires 5w30 (as stated on the oil filler cap)

the weight is determined generally by the engine clearances. larger clearances thicker oil smaller clearances (pretty much all of todays new cars) thinner oil also miledge and where you live the time of year and the temperatures of where you live are all to be considered as well.
these older engines in our trucks (espically the 2F) is basically a modified tractor engine and the engine clearances had a fair amount of "tolerance" between bearings and other moving parts inside of the engine right from the factory.

That being said these are obviously not crappy engines in fact quite well built engines even tho by todays standards they are lacking in power quite heavily. but back in the 80's the speed limit was quite a bit lower and "the man" was cracking down on emisions and there wasnt really a "high performance" vehicle espically not a truck / suv that got any decent MPG and raw power was never really the big focus then like it is most certainly becoming in todays world. I mean hell my 92 honda prelude 4 cylinder came with 165 hp from the factory (i have a JDM motor F22b) and in 2001 the us version came with 205 hp. and would also rev to 7,500 Rpm before the rev limiter would hit as opposed to my seemingly useless 6,400 RPM of the older engine.
 
Amsoil.

Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil

Amsoil synthetic gear oil as well.

SEVERE GEAR® Synthetic Extreme Pressure (EP) Lubricant 75W-90 (SVG)
 
I run 15W-50 from Mobile 1. if you have a Wal-Mart close by you can get 1 GAL for $21.97! I stocked up for the year.

Mark
 
Amsoil.

Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil

Amsoil synthetic gear oil as well.

SEVERE GEAR® Synthetic Extreme Pressure (EP) Lubricant 75W-90 (SVG)


but ya gotta drive it to enjoy the benefits man............................;)
 
My 1987 FJ60 has 195,000 miles on it. I have run Shell Rotella T 15W-40 (not synthetic), changed every 5,000 miles, since I bought it in 1988. The engine still uses no oil, the oil pressure still reads right at the high end of the range even at idle, and when I pulled the valve cover to adjust the valves this past summer everything still looked clean and new inside (no sludge). I must admit that I originally started using the Rotella primarily because in 1988 it was one of the few oils that was readily available in gallon jugs (two gallons is easier and faster to pour than 8 quarts), but after all these years and miles I doubt that a synthetic could have performed better at twice the price.
 

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