question on oil
Thread Starter
Intermediate
Joined: Aug 2009
Posts: 30
Likes: 0
question on oil
i have a built head (reving 7.2) with a built bottom end 12.1 compression and the last owner used redline 10w30 oil but i cant find any around my area so im switching it to amsoil 10x30 with a napa wix oil filter
can someone school me if this will do anything to the motor or will it give the car any sort of problem any input will be appreciated
can someone school me if this will do anything to the motor or will it give the car any sort of problem any input will be appreciated
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
As long as the oil meets or exceeds the GM spec (I believe Red Line does) changing oils is fine! You will be fine. When the Oil Life Monitor says change the oil, change it.
It really accurate and dependable!
BC
It really accurate and dependable!BC
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Redline can be bought on line. In my opinion it is a step above the other synthetics using a different base. Other oils should work fine as well. I am using the German Castrol 0W-30, which is 12.1 Cst at 100 degrees C. This is near the top of the 30 weight range. Redline is 10.6. Amsoil and Mobil-1 are closer to 10 Cst, near the bottom of the 30 weight range.
Tech Contributor
Joined: May 2008
Posts: 2,843
Likes: 16
From: Howell Michigan
St. Jude Donor '09-'10-'11
Redline can be bought on line. In my opinion it is a step above the other synthetics using a different base. Other oils should work fine as well. I am using the German Castrol 0W-30, which is 12.1 Cst at 100 degrees C. This is near the top of the 30 weight range. Redline is 10.6. Amsoil and Mobil-1 are closer to 10 Cst, near the bottom of the 30 weight range.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Well, this is odd. I just checked and the Mobil-1 5W-30 is 11.3 Cst and the 10W-30 is still 10. Not sure if the data sheet is wrong or they changed the 5W-30 formula. Amsoil is now 10.8 Cst in both the 5W-30 and 10W-30. Amsoil used to be higher but they had trouble staying in range as the oil wore. Then they reformulated and dropped the viscosity down to what I remembers as the low 10's. I ran Amsoil 5W-30 several years ago and when I changed it the oil had always snuck into the 40W range of viscosity. The used oil analysis on it was always very good though.
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