Oil wieght for turbo motors

[IHateHacks]

The recommended viscosity oil changes with ambient temperatures. If you don't know what ambient means go look it up in the dictionary.

As far as putting in heavier oil to mask problems, thats hack sh!t.

TSRM recommends 5w30 for temperatures of 50 degrees F to below -20 degrees F. Perfect for winter. I run 5w30 in the winter with no problems because my engine is not worn. If you have problems with running 5w30 in the winter, you better start saving for a rebuild.

TSRM recommends 10w30 for temperatures of 0 degrees F to above 100 degrees F. Perfect for summer.

TSRM recommends 10w40 for temperatures of 50 degrees F to above 100 degrees F. TSRM does not recommend running 10w40 in below 50 degree temperatures.

TSRM recommends 20w50 for temperatures of 80 degrees F to above 100 degrees F. TSRM does not recommend running 20w50 in below 80 degree temperatures.

I don't see any reason to run 20w50 in a MK3 supra unless the main bearings are excessively worn or the clearances are too big.

5w30 in the winter and 10w30 in the summer, period.

[Caliturbo88]

Yea, i thought it was too thick BUT the guy we bought it from has been a tech for 25 years so i dont htink its hurting it if he doesnt htink it is. Next oil change ill probably be going to 10w40 amsoil full synthetic.

[scruffboy]

This is not a "dis", as you have given me good advice before, but I've used Mr.Nickleye's high mileage formula of 20w-50 summer, 10w-40 winter, and I think the man knows his stuff. While my engine is not about to drop out of the car, I would have to assume that tolerances when new are now slightly off. Anyway, I've run this formula for a year now and have had no problems whatsoever. I change my oil every 3 months and do not seem to be losing any. Now the guy with the rebuilt motor is another story, I'm sure he'll have tighter tolerances and won't need to go with the 20w-50, but for me it works. Thanks Mr.Nickleye.

Scruffboy