VR-1 20w50 conventional vs VR-1 20w50 synthetic?

[creaturecat]

VR1 dino is a well-proven oil for use in these cars. there's always that.

[dictoresno]

Originally Posted by creaturecat

VR1 dino is a well-proven oil for use in these cars. there's always that.

Which is why I still run it.


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[Matthew_VA]

I just bought a 6 quart case for $39 on Amazon.

Originally Posted by 911obgyn

I switched to M1 20 50 a couple years ago on an over 180k motor. Was running VR1 changed after checking ZDP numbers and availability and price.
VR1 is over 10$ a quart now and hard to find.
No extra leaks, have fixed a few over the years…

[Duc Hunter]

My understanding from reading all of the many and extensive oil threads both here, and on many other boards led to the same conclusion of all of those threads. Early synthetic oils had significant problems with causing leaks because they had such high detergent properties, and they would cause problems with shrinking the seals, etc. Very quickly Most mainline synthetic oil producers change their formulation’s to prevent the seals from causing issues. Yes excess varnish will be washed away and if that’s what’s holding your motor together, it will start causing leaks. That said if varnish is keeping your engine from leaking it probably needs to be resealed anyway. Net result is I don’t think synthetic oils of today will cause any problems with our engines. Plus, I agree with Some above in that synthetic oils are far better at handling the high temperatures inside of our engines. That said I run VR one and flip between synthetic or dinosaur oil depending on what I find. No leak issues.

[RSTarga]

I've used M1 15-50 for 50 years in all my air-cooled over the years with never a problem.
change it every 5k or 6 months, if you want to pay more its your choice.