What engine oil do you use and why?

[JohnW8]

Like the title asks, what engine oil do you use and why?


Until recently I used Mobil 1 10w/30, because it was readily available, and able to hold up well to higher temps found in a racecar.

What's your choice?

[joeg]

Mobil 1--15 W 50.

Readily available.

[chuck baader]

A racing oil only that contains zink. A street oil will kill a flat tappet motor on the track. CB

[Chip42]

Amsoil dominator 15w50. for the same reaosn Chuck aluded too: ZDDP content. but also because of its temperature stability and flow characteristics. it's survived at 300°F in the MR2 (cooler gets it to 260 in clear track!...warts and all) and still appeared to be stable, where Mobil 1 had shown signs of breakdown.

oh, and I'm a dealer, so... let me know if you need some

[coreyehcx]

10w30 Amsoil Dominator

Same reasons as Chip described.

10w30 puts me at an oil pressure Im happy with for my setup.

[bamfp]

I use nothing that I can buy at a local parts store over the counter. Gibbs, Amsoil, Brad Penn, Redline.

[ajmr2]

I've used Mobil 1 15w50 in my race car for 16 years. No issues. I use Mobil 1 5w30 in my 2 TSXs and my '94 E 150 tow vehicle. No issues. Worth every penny and woudn't use anything else.

[preparedcivic]

In the race car, Mobil One 15W-50. It is the only M1 grade still with a high zinc content.

The autocross car gets 10W-30 M1. My C6 Vette the factory fill M1 5W-30. The Ford trucks get Motorcraft 15W-40 and 5W-20 for the 6.7 diesel and V-10 respectively. The only car on dino oil is the TSX, and that has had 5W-30 Castrol every 5k and it's now up to 112,000.

[gran racing]

For the racecar:

3 quarts Mobil One 0/40
1 quart Rotella 15/40 or straight 30

Why? Kessler Engineering told me to. LOL

[callard]

Dave,
Are you throwing in the Rotella for the zinc?
I'm running Mobil 1 15/50 in the 911 (270 + oil temps) along with some CamShield for the extra ZDDP.
Chuck

[JeffYoung]

For the reasons Chuck lists, I am pretty sure using Valvoline VR whatever in my car resulted in bad cam wear.

Switching over to either Amsoil or Joe Gibbs now for the new motor.