Originally Posted by kschachn
Originally Posted by michaelsvintage
Originally Posted by dlundblad
All oil gets watery when hot. It's not pancake syrup when it's 200+*F.
Yes, I mean relative to other oils. One racer described a 20psi loss in running oil pressure, compared to 2psi under similar conditions with the Amsoil mentioned in the OP.
VR1 is an option, but honestly I'm a little guy shy about it because the previous owners were running it and I discovered a wiped cam. Could obviously be a coincidence, but it could also be indicative of something.
If that is the case then the grade ExxonMobil prints on the containers is incorrect. Either it meets the viscosity range appropriate for the grade or it doesn't. It sounds like a lot of racers try and use the "eye viscometer" and are failing, just like everyone else who attempts to do so.
And that wiped cam, how did you determine it was due to the oil? Not due to poor design or material failure?
I'm just reporting what I've been told, but since there are multiple sufficient options I see no reason to take the chance.
The cam failure may have been a material issue, but it was an Isky cam with one of their "normal" grinds so I'm not sure I'd say the design was to blame. There was a lot more lift and therefore spring pressure with that cam as well, but again if I have multiple good options and one may have been an issue, I see no real reason to spend my time and potentially my parts to find out for sure. This car doesn't get the same time as my customer cars do (cobbler's shoes situation) so I need to be as efficient as I can with the time I spend on it.