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This is a 2009 GM 427 7.0 LS7. Some call them a big block but it has the same exterior dimensions as the other LS engines. Uses dry sump oiling stock.

Factory clearance (oem calls for 5w30) as it hasn't been rebuilt before, naturally aspirated, 7300 rpm max rpm, 94 E10 fuel, gets stored from November to April, hydraulic roller cam, 3 to 4 days a week it sees many full throttle pulls from 1st to 4th, oil capacity is 11 litres, stock cooling. In...

I remember reading about foaming but used T6 5w40 in a setup without any issues for over 13 years, never noticed foaming when checking the dip stick. It was a 1.8L Honda engine originally making 130 hp stock, then after turbocharging it made 350 hp for over 13 years, many 7600 rpm visit. Oil...

Rotella T6 5w40 has proven itself in the past on higher hp gasoline setups. IF PP Euro 5w40 is superior in every way, that's all I want to hear.

Sounds like Pennzoil Platinum Euro 5w40 is accepted as the better oil. Thanks for the replies.

Hello, I've been browsing and couldn't find a thread comparing Rotella T6 5w40 against Pennzoil Platinum Euro 5w40 with oil analysis results. I found an older thread stating that the new Pennzoil Platinum Euro 5w40 is what the old Pennzoil Ultra Platinum 5w40 was called. Anyways, I have a...