ZSK

Has anybody used this oil? I checked on the Valvoline website and it tells me this is not compatible with the 1975 Corvette 350. It seems perfect after reading the description.

Thanks!

ukjohn

I use it, as do lots of other C3 owners here in the UK

Eric P

good oil ,and you need it, they say it's not compatible because it's a street car and high zinc content hurts longevity of a modern catalytic converters but that won't effect your car and the flat tappet cam and distributor gears need the extra zinc

ZSK

Thanks!

Mdbirk

I like shell rotella t4

boat196

If your motor is original, Rottela would be fine. Plus the cost savings on oil changes over Valvoline.

LenWoodruff

In my 78 I use Valvoline VR1 per my engine rebuilder 20w-50. By this time there is nothing left in the cat for this to do any damage to it.

7t9l82

20-50 Redline. All I use.

sleepchamber

I use 10w30 vr1 in my 355 and roller 383.

pltmgr

I have no experience with valvoline VR1 but I use Mobil 1 15-50. High zinc, relatively inexpensive and relatively available {Walmart).

kossuth

I wouldn’t personally run T4 in any small block or big block. I have admittedly run it in several older gasoline tractors.

There are alot of additives in oil along with ZDDP, and some to do with anti foaming etc. The old gas tractors had a max rpm of 2200. I’m sure they are more than fine. With a small block or big block I would be worried about the RPM and the foaming possibility.

I’m no expert by any stretch so maybe it’s a non issue.

Mdbirk

I build my own stuff, my big block puts out 630hp, just tore it apart last summer and rebuilt it , it was last rebuilt in 2001. ... I've only ran t4 in it. It has seen a lot of use including racing and I bang shift that thing at 7000rpm all day long. The guys at the track,the truck and tractor pulls around here use it too. Shell themselves recommend it for use in classic cars too. Either way oil is a big argument and my two cents is rotella t4 is good **** that ain't expensive.

roscobbc

I'm with my Vette buddy John re. the Valvoline!

1860army

That rotella sure is cheep, about 20 bucks an oil change if you buy it in bulk, VR1 costs me about 30...or 3-4 DD coffees.... I do two oil changes a year generally, at this stage of my life I'll just error on the side of caution and use an oil designed for gas engines...

60

cottoneg

It might be a matter of detergent.

I think Valvoline VR1 is their racing oil. As a rule, racing oil is not recommended for street use. It is meant for race engines with high loads and to be changed frequently. It does not have the same rust and corrosion inhibitors an oil meant for street cars.

I would tell you what I use, but oil is topic where everyone has a different opinion.

roscobbc

I'm guessing that most reading this thread will be changing their oil annually anyway.......the higher mileage and perhaps daily all season drivers may want to consider alternatives.....or simply change oil more frequently? - The 'Racing Oil' name given by Valvoline is perhaps more of a marketing 'thing' - real, heavy duty racers might be using specialist thinner viscosity oils?

MelWff

There is more than one type of VR1, synthetic and conventional. I have used VR1, conventional, 10W30, silver bottle, for decades. Says right on the bottle For Classic Cars.
https://shop.valvolineglobal.com/pro...saApKaEALw_wcB