I am going to purchase a case of driven's new GP-1 high performance oil for my 05 impala. I just felt like sharing. 10W-30 will be the grade.
I still have the 12 quarts of Driven LS30 that I picked up on Amazon for $35. That's going to be my next oil change in my 05 Impala.
You sure you wanna do that? Both of those have enhanced quantities of ZDDP which make them catalytic converter killers. I get that enough oil has to get past the rings to be harmful, but why? The GP-1 looks like the old Brad Penn that is now Penn Grade 1. I got a case of LS30 cheap too. Don’t all LS motors have roller cams? Do they need that much ZDDP? I plan to use mine in a Gen 1 SBC with a mild hydraulic roller cam. The price was right.
The damage to emissions has to have high amounts of oil consumption.
GP-1 is very different from the old Brad Penn. It's an entirely different add pack with a good bit more moly and boron.
ZDDP has benefits in areas other than the cam. Pretty much any area that operates in mixed or boundary lubrication will benefit. It also has the secondary benefit of being an anti-oxidant. We're also talking about a more reactive secondary alkyl ZDDP.
LS30 has 2 different types of moly additives and a good bit of ester also.