Dear sifu, I just did a major service on tyt SC (200k km)
Previous 3 years was on Synthium 800 10w-40.
Now the Toyota SC I opt for semi 5w-30, their in house EO. they don't have 10w 40
After this is it ok to back with 800 10w-40? For better overall performance and protection for the engine (1NZ-FE)?
So, I get back to pet page, they have a new EO under synthium 800 too which is 5w-30. Actually to my understanding, the W have nothing to do with our country, and the number at the back 40 is thinker than 30 in optimum temperature. Shall I cont with 5w-30 or go to 10w 40 like before?
And anyone used SynGuard by BHP? hows their performance?
And I confuse on their line up too, they have synguard 6000 and 6000 ECO, cant find any diff between them...
old engine with 200k km mileage.
personally, i'll suggest u stick with 40 weight oil.
lighter oil might sip out and u will experience EO burn.