so i want to change my oil what would be the best oil to put in my 2000 s80 2.9 non turbo and can i switch from motor oil to synthetic oil if that be the case .

 

i just switched to castrol syntec on my 99 S80 T6. It is better for your car to run on synthetic oil, go ahead and use it.

 

I use Mobil 1 in my car.

 

I use Royal Purple...FANTASTIC Oil

 

Royal Purple is great but a bit pricey if I remember right.. of the walmart brands Mobil 1 is my choice followed by Castrol Syntec...

When not in the US, its a toss up between Mobil 1 and Shell Helix Ultra...

There is NO harm in switching to synthetic, it can only help the engine...

 

I dont know how turbo's work, but why is it that i hear a lot of people saying: "if your car has a turbo is almost a must to use synthetic", my manual recommends synthetic actually

also, why the heck does our (S80 T6) low compression bi-turbo V6 engine use 6.9 Litres of oil ?????? that's a lot, my last V6 (97 nissan maxima 3.0L N/A) used only 4 litres...

 

The turbos use engine oil for lubraction, thus the increased oil capacity helps keep the engine and turbos lubricated.

 

I've used Mobil 1 since I purchased my S80 T6 at 30k miles. I change it every 6 - 7k miles and it's still visibly clean at that point.

Joe

 

Thereare dyno results of ~5+hp gain from using synthetic.
Mobil 1 [sm=yeahsmile.gif]