View Poll Results: What oil is in your LT1
Castrol Syntec
47
25.41%
royal purple
72
38.92%
AMSOIL
26
14.05%
You don't care they are all the same
40
21.62%
Voters: 185. You may not vote on this poll
What oil is in your LT1
12-31-2007 | 06:31 AM
#81
Wall mart. LOL There hypertech or whatever stuff. Been using it in all my cars, I've had 2 motors with it run through them with about 4k and the bearings are mint. I tryed there walmart full synthetic last time I changed it. 10-40 BTW
It's cheap and it works good for me so I'll keep on using it!
Edit: One of these I'm going to send it in to an oil analyst place after 3k and I'll post up the results.
It's cheap and it works good for me so I'll keep on using it!
Edit: One of these I'm going to send it in to an oil analyst place after 3k and I'll post up the results.
It's actually a pretty decent oil 
12-31-2007 | 01:40 PM
#86
12-31-2007 | 04:01 PM
#90
On The Tree
Joined: Jul 2006
Posts: 177
Likes: 0
From: Keego Harbor, Michigan
12-31-2007 | 04:46 PM
#92
If you read the owners manual 10w-30 is acceptable long as it is above 0F and overseas they recommended 15w-40 in the LT1. North American oil weight recommendations are driven by CAFE(corporate Average Fuel Economy) not by what works best.
10w-30 is NOT necessarily thicker than 5w-30 at operating tempature, matter of fact German Castrol 0w-30 is thicker than M1 5w-30 which is thicker than M1 10w-30, bet that throws everything you thought you knew right out the window.
M1 5w-30 and 10w-30 has been solidly shown to result in higher iron wear in LT1s and LS1s for that matter than other options at and below the same price.
10w-30 is NOT necessarily thicker than 5w-30 at operating tempature, matter of fact German Castrol 0w-30 is thicker than M1 5w-30 which is thicker than M1 10w-30, bet that throws everything you thought you knew right out the window.
M1 5w-30 and 10w-30 has been solidly shown to result in higher iron wear in LT1s and LS1s for that matter than other options at and below the same price.
12-31-2007 | 05:54 PM
#94
If you read the owners manual 10w-30 is acceptable long as it is above 0F and overseas they recommended 15w-40 in the LT1. North American oil weight recommendations are driven by CAFE(corporate Average Fuel Economy) not by what works best.
10w-30 is NOT necessarily thicker than 5w-30 at operating tempature, matter of fact German Castrol 0w-30 is thicker than M1 5w-30 which is thicker than M1 10w-30, bet that throws everything you thought you knew right out the window.
M1 5w-30 and 10w-30 has been solidly shown to result in higher iron wear in LT1s and LS1s for that matter than other options at and below the same price.
10w-30 is NOT necessarily thicker than 5w-30 at operating tempature, matter of fact German Castrol 0w-30 is thicker than M1 5w-30 which is thicker than M1 10w-30, bet that throws everything you thought you knew right out the window.
M1 5w-30 and 10w-30 has been solidly shown to result in higher iron wear in LT1s and LS1s for that matter than other options at and below the same price.
whaaatttt ??
so you're saying mobil 1 5w and 10w-30 result in higher engine wear when compared too.... ? (what brands do you recommend then)
12-31-2007 | 07:01 PM
#98
I have the valvoline max life 10w-40 running right now and I am overall pleased with it. the engine runs very nice at 162K and I plan on keeping it that way.
another note I now put in 5.5 quarts in my car compared to just 5 and I have noticed a large gain in pressure.
another note I now put in 5.5 quarts in my car compared to just 5 and I have noticed a large gain in pressure.
