 Should I switch to 20w-50w from my single weight oil?, I use 30w in winter and 40w in summer...should I switch to 20/50 qnd why? |
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| second wind |
 Jun 13 2023, 10:46 PM
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Senior Member  Group: Members Posts: 854 Joined: 30-December 10 From: Los Angeles, California Member No.: 12,543 Region Association: Southern California 
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What do you guys think I should do on my upcoming summer oil change? I use Valvoline VR-1 so should I jump to 20-50 from a straight weight? Do tell??
Thank you, gg |
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| Cairo94507 |
Jun 14 2023, 06:28 AM
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Michael Group: Members Posts: 9,759 Joined: 1-November 08 From: Auburn, CA Member No.: 9,712 Region Association: Northern California
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| rfinegan |
Jun 14 2023, 07:07 AM
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Senior Member Group: Members Posts: 973 Joined: 8-February 13 From: NC Member No.: 15,499 Region Association: MidAtlantic Region
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I plan on running 15w-50 too, unless its in the heat of the summer and then 20w-50 till its a bit cooler here in NC
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| Steve |
Jun 14 2023, 07:53 AM
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#4
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914 Guru Group: Members Posts: 5,585 Joined: 14-June 03 From: Orange County, CA Member No.: 822 Region Association: Southern California
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I have used 20-50 in my previous 2.7, since 87 and my current 3.2 since 2000. Otto's recommended it at the time, as well as Patrick Motorsports and Hergesheimer's. PMS installed Castrol 20-50 when they resealed my 3.2 a year ago. Regarding synthetic, the consensus from the shops was if it didn't come with synthetic from the factory, than don't use it. In the past I used 20-50 VR1, but recently castrol came out with higher zinc in there castrol classic and since PMS used it, I figured they know what they are doing. However, everyone is all over the place on this subject and everyone has an opinion.
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