Great site here, been reading voraciously the past week or two.
Didn’t realize there could be such variation in viscosity with the same weight range of oil!
Have 10W30 Pennzoil Platinum in my 2005 Legacy GT with Accessport Stage 2 mods (Uppipe and Downpipe) Will be setting off my first oil analysis ever to a lab in a few weeks when I do an oil change. Will be giving Pennzoil Platinum 5W30 a try for the winter, seems to flow fairly well at low temp. (Viscosity @ 40°C, cSt 59.66) and would like another analysis done with the same oil line just to get a better opinion about it come spring.
Now, onto my questions!
The new M1 5W-30 seems like it might make a nice summer oil, being fairly a fairly thick 5W-30 on the cold and hot pour viscosity side of things (cSt @ 40º C 64.8
cSt @ 100º C 11.3). The Pennzoil 5W-30 seems to be in the middle/on the thin side ( cSt @ 100º C 10.52) at high temps. The one oil analysis of 10W30 Platinum from a fellow LGT owner shows the viscosity was maintained over 7000 miles of fairly hard driving (drag racing) and all the numbers were good, although around a quart was added over the time period.
I don’t think anybody has posted an analysis of the newly formulated M1 yet in summer, curious if the viscosity holds up or if it shears down. Did I miss an analysis of the new M1 somewhere? In any case, I’ll be looking for a synthetic that is on the thick side of 30 weight, or maybe even a 40 weight when summer rolls around. Temps are usually in the 80s/90s, and I will be doing some autocrossing/drag racing as well. Any suggestions?
One more question, and this is about valvetrain noise. If an oil is on the thinner side of the correct weight and there is some increased valvetrain noise, yet an oil analysis shows everything is normal, is it anything to worry about in terms of long-term reliability, or just a issue with increased noise?
Thanks for any and all replies, and I’ll be sure to share my analysis with everyone when I get it.
-B
Didn’t realize there could be such variation in viscosity with the same weight range of oil!
Have 10W30 Pennzoil Platinum in my 2005 Legacy GT with Accessport Stage 2 mods (Uppipe and Downpipe) Will be setting off my first oil analysis ever to a lab in a few weeks when I do an oil change. Will be giving Pennzoil Platinum 5W30 a try for the winter, seems to flow fairly well at low temp. (Viscosity @ 40°C, cSt 59.66) and would like another analysis done with the same oil line just to get a better opinion about it come spring.
Now, onto my questions!
The new M1 5W-30 seems like it might make a nice summer oil, being fairly a fairly thick 5W-30 on the cold and hot pour viscosity side of things (cSt @ 40º C 64.8
cSt @ 100º C 11.3). The Pennzoil 5W-30 seems to be in the middle/on the thin side ( cSt @ 100º C 10.52) at high temps. The one oil analysis of 10W30 Platinum from a fellow LGT owner shows the viscosity was maintained over 7000 miles of fairly hard driving (drag racing) and all the numbers were good, although around a quart was added over the time period.
I don’t think anybody has posted an analysis of the newly formulated M1 yet in summer, curious if the viscosity holds up or if it shears down. Did I miss an analysis of the new M1 somewhere? In any case, I’ll be looking for a synthetic that is on the thick side of 30 weight, or maybe even a 40 weight when summer rolls around. Temps are usually in the 80s/90s, and I will be doing some autocrossing/drag racing as well. Any suggestions?
One more question, and this is about valvetrain noise. If an oil is on the thinner side of the correct weight and there is some increased valvetrain noise, yet an oil analysis shows everything is normal, is it anything to worry about in terms of long-term reliability, or just a issue with increased noise?
Thanks for any and all replies, and I’ll be sure to share my analysis with everyone when I get it.
-B
