Quote:
Originally Posted by saaber1
Hello, picking up an 85' MR2 today and was wondering what is the best oil viscosity to use? I have some m1 0W40 and german castrol 0W30 and redline 5W40 laying around. Does this engine prefer thick or thin oil? What oil change interval is best?
Thanks!
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for the millionth time,
PLEASE CONSIDER THE MILEAGE OF THE ENGINE BEFORE THINKING ABOUT SWITCHING TO A SYNTHETIC OR SYNTHETIC BLEND IF THE ENGINE HAS PREVIOUSLY BEEN SERVICED USING CONVENTIONAL OIL.
that being said, depends really on your climate/season for weight of oil. the 0W30 would be great for colder climates. 10 or 5W30 is fine for most applications. some like to use 20W50 for hotter, harsher environments. some use it for 'race' grade oil. as for mileage, it really depends on a few things: air filtration/contaminant level, and what you'd like to believe. 3k miles is the old adage, but current oil 'technology' dictates a longer service interval due to updated detergent quality/quantity. RedLine used to have a service interval of 7.5k-10k miles with an oil filter change at the halfway point along with top-off.