im hearing differant things, i just bought the car and havent changed the oil yet. i was told 20w 50, 5w 30, 10w 30, synthetic, non synthetic? how od i know whats right. the previous owner told me hes been using 20w50, if that is the wrong oil should i switch to something else? or do i need to stick with it?
oil?
- Thread starter RGS87GN
- Start date
Warp6
Mine since '92
- Joined
- May 25, 2001
Same here
First off, I would use an off-highway/racing oil. These have much higher ZDDP content than the everyday API oils for highway use. This is a must if you have a flat tappet cam... read this link Zddp Oil Issues
Second off is what grade of oil which will depend on the use and miles. Most use 10w-30, but if you have a high mile engine straight 30 will provide better oil pressure (at least at the gage).
Second off is what grade of oil which will depend on the use and miles. Most use 10w-30, but if you have a high mile engine straight 30 will provide better oil pressure (at least at the gage).
Guys that are using the Valvoline Racing Oil (the off-road version) just be carefull with it, especially if there are rollers in the engine. The oil also contains high levels of Moly. Moly makes things too slippery. The rollers will not roll, they will glide and wreck havoc.
Rotella has changed the formula of their oil recently. The 1 gal jugs with the "rainbow" is the newest version with reduced levels of zinc.
The oil that should be used is this:
Penn Grade 1 Racing Oil
I too were using the off-road Valvoline racing oil but going to switch to the BradPenn former Kendall oil.
The viscosity depends on your clearances in your motor. You just have to try them out and see what your oil pressures are.
Billy T.
gnxtc2@aol.com
Rotella has changed the formula of their oil recently. The 1 gal jugs with the "rainbow" is the newest version with reduced levels of zinc.
The oil that should be used is this:
Penn Grade 1 Racing Oil
I too were using the off-road Valvoline racing oil but going to switch to the BradPenn former Kendall oil.
The viscosity depends on your clearances in your motor. You just have to try them out and see what your oil pressures are.
Billy T.
gnxtc2@aol.com
Valvoline Vr1 10w-30 or 20w-50. I have been running 10w-30 and it has been good for me. I know some other people running 20-50, but they have race motors. I know you can get the Vr1 at Auto Zone and Napa. HTH
Last year a valvoline rep asked me to try thier 20 50 racing.oil in my gn...sooo i dumped my oil and filter......I started the car and noticed even with their 20 50 the oil pressure was 3 or 4 lbs lower.....so what....as the engine was idleing (5 mins) and i was washing my hands....low and behold the rockers started squeaking on the shafts....yes there was oil going up into the heads......soooooo i stopped the engine ..drained the oil and filter topped up with my favorite blend rotella and eos...started engine....no more squeaking and oil pressure normal.....i do not remember viscosity of rotella OPINIONS FROM OIL TECKS gm once sold an anti squeak for chev rockers that were squeaking well i remember pouring in the engine this liquid to stop rocker squeaking
im in the brockton area. i think im gonna go with the 10/30. these gn guys make everything way to complicated haha
![DSCF0104[1].jpg](https://turbobuick-data.community.forum/attachments/20/20226-68e83611f5da8b37e4a72dc788b80475.jpg)
My engine builder told me stay w/ rotella t 15w-40 they used it to all ther engines any one on this one?
yeah but, ben rothlesberger is a bum, so you gotta factor that in
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