So what kind of oil do you use in your car?

[anotherjeff]

Just wondering what kind of oil folks are using in their esteem?
High mileage, synthetic, 10w30 or other weights?

[jim_naisium]

For engine oil I use Valvoline 75,000 mile+ 10W30.
In the automatic tranny I also use Valvoline Dexron III 75,000 mile+ tranny fluid.

[MysticX]

I personally get Quaker State Synthetic or Pennzoil Synthetic when it is on sale, usually around $2/quart. I use 5W30 in my 2001, it is what the manual recommends and it is good for the cold winter temps in the Midwest.

[Ironrat]

Mobil1 5w-30 Synthetic.

[anotherjeff]

So why would some people use 10w30 versus 5w30? Is there any problems if you had one type of oil in your car and topped it off with a different type of oil?

[jim_naisium]

No not really, if you mixed them 50/50 you would just end up with something like 7.5W30. The "30" is what is important once the engine is warmed up, the leading number "5", "10", "etc.", is what the oil acts like when the engine is cold.

[jtgh]

chevron all the way.