Fuel savings. There is a interview with one of the Toyota design engineers floating around somewhere from a few years ago, where he says basically that - that there looking at 0W-8 for improved fuel mileage.
OW-8 is the engine saying "OW!"Just wondering how different stated OW-8 is from 0W-8?
Is that just your fantasy or does the car actually use multiple radiators and multiple gallons of coolant? I tend to think not, at least WRT the amount of coolant, but multiple radiators have been used before.Coolant capacity would be interesting. Imagine 3 radiators and 10 gallons of coolant with electric water pumps.
Wondered about that too!Just wondering how different stated OW-8 is from 0W-8?
I just made that up but if these engines are using 5 quarts of 0w8 I would think keeping oil temps in check via /high efficiency coolant system would be a must.
Nothing would be based on mechanical need, only whatever would be consistent with their fuel economy requirements.
Oh, I agree with that completely. Toyota has been using coolant temperature management for several years now, and it's a well-known concept that AFAIK, has been used on several marques (but don't ask me which ones).
Prolly all way to 10w-50. They often have a section and say - 'For vehicles outside EU and USA' and give a wide range of oil weights.
