Motor oil
Looking for help picking a motor oil to run in my original L79 motor. I just finished the first 500 miles after a rebuilt. Weight, conventional, synthetic? Any help is appreciated. Speed shops are trying to sell me 20-50, I think it is to heavy.
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Looking for help picking a motor oil to run in my original L79 motor. I just finished the first 500 miles after a rebuilt. Weight, conventional, synthetic? Any help is appreciated. Speed shops are trying to sell me 20-50, I think it is to heavy.
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Re: Motor oil
Look Here, there's a good article from Duke William about oil for vintage engines
https://www.forums.ncrs.org/showthre...&highlight=oilDon Harris
Current: 67 convertible Marina Blue L79
Former: 60 Red/Red, 2x4, 245hp (Regional and National Top Flight 2013), 66 coupe Nassau Blue, L79 (Chapter and Regional Top Flight 2017) -
Re: Motor oil
I have been running Shell Rotella 15W40 in all of my old Corvettes for many years with no issues.
Oil is one subject you will never get a consensus on. Duke's article is very informative.Comment
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Re: Motor oil
I am also using Shell Rotella 15W40 in my original owner 68 L79. Engine has not been rebuilt. When I started using Rotella I could get 10W30, don't see it on the shelves anymore where I shop.Comment
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Re: Motor oil
I too use the 15wx40 Rotella T in my 63 L-76 SHP. I wanted to go to the 10wx30 for the cool months and had heard "Advance Auto Parts" would/did order it for some of the other TDB users. Ihave a store a couple blocks from my house so I stopped in to check, and low and behold, they had as much 10wx30 on the shelf as 15wx40. So, I picked up to gallon jugs for my next oil change.
For me, the heavier oil was running a bit too high on pressure and I was experiencing a few minor leaks. I hope the lighter weight oil may work out better - at least in the cooler months down here in Florida.
Stu FoxComment
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Re: Motor oil
No need to go to a speed shop 'boutique' to buy oil. Walmart carries Rotella.Comment
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Re: Motor oil
What's with this Rotella obsession? It's far from being the only game in town.
DukeComment
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Re: Motor oil
It's the only brand that many of us can find without a special order.Comment
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Re: Motor oil
Most auto parts stores I go to stock Delo, Delvac, and Rotella, plus a house brand... same with Walmart, but Costco only carries Delo.
I just buy the least expensive CJ-4 I can conveniently find.
DukeComment
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Re: Motor oil
Just the other day I encountered for the first time, and bought, a gallon of Valvoline Cummins-approved synthetic that is CI-4 and CI-4 Plus rated and is 5W-40. Though it was espensive at about $30 I bought it because I was remembering (maybe in error) that CI-4 has a more reliable content of zinc than CJ-4. I also thought that maybe the 5W would be easier on a cold, cranking motor. Thoughts?Comment
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Re: Motor oil
Thanks for all of the reply's. Like Paul my oil presure is a kind of high, maybe still breakin in. I will try the 10-30, Retolla seems very popular they should pay you royaltiesComment
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Re: Motor oil
Walmart CJ4 all U need 2 do. Many Duke posts on this.
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Re: Motor oil
I ending up with Joe Gibbs Driven 10-30w conventional. Not the cheapest, but worth it to me, $9 a quart at local speed shop. Still plenty of oil presure, 40-50 psi at idle. I only have around 400 miles on a rebuilt engine.Comment
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Re: Motor oil
I use Brad Penn 30 weight in my 62 for under $6.00 a qt. No problems with oil pressure on my P.V. this summer.
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