Originally Posted By: mickeeand
Hey all,
A bud of mine is using PP 10w-30 in his toy camry and the temps around here are going over 100F as of lately. His 94 camry calls for 10/30 and we were wondering should he go with like a 10/40 or maybe a HD30 or HD10/30?
He wants engine protection and could care less about fuel efficiency.
Look at this photo;
Car? Toyota Corolla 2005 with 5 people in it, stuck in traffic for hours going from San Diego to Las Vegas (which I have done in many vehicles for DECADES)
Check out the outside temp... 112 degrees
Check the coolant temp.. A little BELOW middle which is about 184-195degrees (I normally have the Scan Gauge hooked up but did not take it for this trip)
Oil? 5w-30 conventional with NO worries. I've done UOAs after months of high 90s to this type of temps and they show the oil having an excellent flashpoint, TBN and low wear metals.
I've done it with a V6 Ford, I4 VW, V8 Ford and V8 Chevy and so on.
All my engines go well past hundreds of thosands of miles. Never had to run a x-40wt oil even with yesterdays oils.
If your friend wants engine protection, just change the oil with what the manual recommends and FOLLOW the OCI. A UOA will assist you in finding out what works in HIS engine.
But this thought "process" that 5w-30 oil can not protect in high heat does not face the facts.
Take care, Bill