Found some of the Havoline 10w30 High Mileage on sale at Advance Auto Parts the other so I picked up 5qts to try in a 94 Regal. Its got 130K mi on the 3800 in it.
Right now there's Havoline full-syn 10w30 in it. The Hav. syn is much better than the Mobil1 I previously used. Runs much quiter and the oil pressure stays up better.
I thought I'd try the Hav. Hi-Mi since its 12cSt @ 100deg vs. 10.8 for the Hav. syn. Thought it may help a bit more with the oil pressure.
I am concerned a bit about the "seal conditioners" in it. Is it just a small amount of esters to aid in deposit control and seal-swell/conditioning? If so will there be any adverse effect from using it. The car leaks no oil currently.
If the this "thicker" 30wt helps with the oil pressure, next time around I may try a regular dino 10w40 to bring the pressure up even more or something like Rotella T syn 5w40, since no one around here carries the Havoline syn in 5w40.
The hi-mi formula is available in 10w40, but I'm afraid that'd be a bit too thick at 15.8cSt.
[ April 01, 2004, 03:28 AM: Message edited by: Forkman ]
Right now there's Havoline full-syn 10w30 in it. The Hav. syn is much better than the Mobil1 I previously used. Runs much quiter and the oil pressure stays up better.
I thought I'd try the Hav. Hi-Mi since its 12cSt @ 100deg vs. 10.8 for the Hav. syn. Thought it may help a bit more with the oil pressure.
I am concerned a bit about the "seal conditioners" in it. Is it just a small amount of esters to aid in deposit control and seal-swell/conditioning? If so will there be any adverse effect from using it. The car leaks no oil currently.
If the this "thicker" 30wt helps with the oil pressure, next time around I may try a regular dino 10w40 to bring the pressure up even more or something like Rotella T syn 5w40, since no one around here carries the Havoline syn in 5w40.
The hi-mi formula is available in 10w40, but I'm afraid that'd be a bit too thick at 15.8cSt.
[ April 01, 2004, 03:28 AM: Message edited by: Forkman ]