Umpteenth oil question.

the thing i have always heard about racing oil in a street car is that it doesn't have the additives that typical street oils have ... including cleaning elements.
 
Correct....
The additive package for a racing oil is not geared at all towards 'regular' use - where moisture, time and the repeated heat cycling that street engines go through are not typically encountered in race cars.
 
the thing i have always heard about racing oil in a street car is that it doesn't have the additives that typical street oils have ... including cleaning elements.
Correct....
The additive package for a racing oil is not geared at all towards 'regular' use - where moisture, time and the repeated heat cycling that street engines go through are not typically encountered in race cars.

interesting point
and it is very reasonable to think that those are the consequences of an specific formulation
curious to see how this reality is shadowed in the US , but clearly declared in
Europe, by THE SAME brand !

i wonder how true it would be that the oil in question is really for racing use, and, at the same time recommended for classic cars (older than a certain year 2008)

or if the formulation of that oil is different in Europe and in the US

it always happen to be difficult to reach the contains and properties information of any general consumer product

engine oils are usually advertised more like magic products than technical fluids
 
I have been known to have large quantities of VR1. Still do. I recently bought a bunch of Castrol GTX Classic 20w50. It’s an SJ rated oil vs the current SN spec which I find really exciting.

I run Mobil 1 15w50 in my M88 and S38 simply because that’s what they’ve been running for a long time and inside of the engines look brand new.

For fun, here’s an old shot of a day of collecting VR1 during a sale at AutoZone. $2/quart.
AF025BFB-BCA9-47AC-ACBB-327EC0564ECF.jpeg
 
I am intrigued by the Castrol GTX Classic and its SJ rating (the closest current API spec to our vintage of equipment). And it has 1310ppm of zinc, so it is right up there with some of the other high zinc content oils.
 
I am intrigued by the Castrol GTX Classic and its SJ rating (the closest current API spec to our vintage of equipment). And it has 1310ppm of zinc, so it is right up there with some of the other high zinc content oils.

curious, no trace of such an GTX oil in Europe: similar grade 15w40, but not classic remark on it



1681294944555.png



a better more modern formulation:

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I’ve always favored Castrol GTX 20W50. Was not aware that there is a “Classic” version. I’ll use it next time.
 
Just to follow up on what I've been using recently - I have been using PennGrade Partial Synthetic 20W50. It has high zinc content as well = 1,500ppm. I didn't know about this oil, but the PO of the 1600 gave me a case if it with the car.
20230412_191649.jpg

So many choices discussed here. Perhaps the most important thing is to take the time to change our oil and keep everything fresh and clean. :)
 
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