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05-18-2024
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#1 |
 
Join Date: Apr 2019
Location: Supply NC
Posts: 124
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Bought Valvoline VR1 20-50
I bought Valvoline VR1 20-50, apparently I wasn't paying attention. My 1990 ZR-1 #2822 has 88k miles right now and is running great. My question is, am I safe with this weight oil? I live on the SE coast of NC and it's hot down here. If anyone has an opinion on this weight oil in the LT5 please chime in. I have been running VR1 10-30 Dino oil with no issues and a Bosh 3401 filter. I can save this 50 weight for my 1972 455HO Pontiac if need be. Thanks guys, lovin my Z, over 10k miles since May of 2020.
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05-18-2024
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#2 |
 Join Date: Nov 2011
Location: Dunbarton NH
Posts: 7,456
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Re: Bought Valvoline VR1 20-50
I'd be savin that for the Pontiac.
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05-19-2024
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#3 |
 
Join Date: Apr 2007
Location: Lake Bluff, IL
Posts: 2,088
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Re: Bought Valvoline VR1 20-50
I had a 1954 Aston Martin DB 2/4 that smoked a bit so I ran 50 weight in it and that minimized the smoke. But I would not run 50 wt. in an LT5. Too close to molasses. As efnfast noted, save it for the Pontiac.--Bob
__________________
2016 Long Beach Red Z06 #10281 "POPS Z" 1995 Polo Green #409 "WARP TEN"--Haibeck 350/510 package, 4.10s, Hurst, Stock Exhaust with QTP Cutouts --Sold but still running strong 1993 Quasar Blue #161 "HIL KING" --Sold but still running strong, now with more than 120,000 miles 1967 Marlboro Maroon/Saddle Corvette Coupe 300 hp/4-spd --Sold a long time ago ZR-1 Net Registry Founding Member #95 NCM Lifetime Member Favorite Quote--Attributed to Mickey Thompson: "Too Much Horsepower is Almost Enough" |
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05-19-2024
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#4 |
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Join Date: Apr 2019
Location: Supply NC
Posts: 124
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Re: Bought Valvoline VR1 20-50
Thanks for chiming in guys. Next time I will pay closer attention to the weight. Thanks again.
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05-19-2024
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#5 |
Join Date: Apr 2023
Location: Houston, TX
Posts: 321
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Re: Bought Valvoline VR1 20-50
My understanding is that our LT5 needs a zinc-phosphate additive (ZDDP) to protect camshafts... similar/same as other engines of same era. I recall Ford and GM having issues with camshafts and lifters in the mid-70s up into the 90s, so engine oils were developed accordingly. Some additives hamper increasingly stricter emissions limits, so as oil technology progressed, zinc was reduced in more modern oils. Newer oils are not necessarily backward compatible. Fortunately, there are still zinc additives and oils with higher zinc content available for those special needs.
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