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04-27-2017, 02:08 PM | #1 |
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Join Date: Feb 2011
Posts: 74
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32 stock V-8 engine oil type
Getting ready to fire up a previously rebuilt stock 32 v8 engine that was rebuilt about 10 years ago and has some run time on it, maybe a couple thousand miles on it I am guessing. Looking for the type of oil to use since I just purchased the car and getting it ready for summer. I found a Valvoline 20W-50 VR1 racing oil that says it has "high zinc, great for push rod and flat tappet engines". Has anyone used this oil and any feedback on it for this application?
I have also read some guys use Delo 15-40 and a Castrol 20-50; and it was suggested to add a zinc additive ZDDP. Any feedback or experience? Thanks |
04-27-2017, 02:17 PM | #2 |
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Join Date: Nov 2012
Location: Wichita KS
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Re: 32 stock V-8 engine oil type
A stock flathead does not need a ZDDP additive, the valve spring pressures a fairly low. A mild amount of it in the oil won't hurt anything, but it is easy to get the level in the oil to high which leads to other issues. ZDDP helps with breaking in OHV flat tappet camshafts especially where high valve spring pressures are involved.
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04-27-2017, 05:14 PM | #3 |
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Re: 32 stock V-8 engine oil type
There is still ZDDP in most oils, although at a lower level. There are other anti-scuff additives in use today as well. No need to worry with your engine. I use 10W - 30 oil in my flatheads.
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04-28-2017, 07:14 AM | #4 | |
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Re: 32 stock V-8 engine oil type
Quote:
and no oil related engine problems. Sounds like your 20-50 VR1 may even be a better oil. What's wrong with over kill?? G.M.
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04-28-2017, 07:29 AM | #5 |
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Re: 32 stock V-8 engine oil type
I use Kendal 20w50 which is their old high performance racing oil, it also has ZDDP
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04-28-2017, 09:57 AM | #6 |
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Re: 32 stock V-8 engine oil type
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04-28-2017, 11:16 AM | #7 |
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Location: Oregon
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Re: 32 stock V-8 engine oil type
Use the detergent oil as it has upscale additives blended to keep your engine running a lot longer. Only use non-detergent if it is an old sludgy dirty block to start with. I like 10-40 Multi grade.
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