I understand the 10w, meaning the winter viscosity. But what is the difference between 30 and 40?
The 10w makes sense...lower rating means oil flows thinner at low temperatures. Therefore better lubrication at startup when it's freezing.
30 vs. 40?
40 weight is thicker (not sure how much more), but not sure what the advantages are. Less oil consumption with the 40? Better for old and loose engines? Does the 40 provide better protection and more cushion/compression against metal?
What advantages/disadvantages are with 30 weight?
Is there a problem stretching the oil viscosity chains from 10-30 to 10-40 (differences of 20 vs. 30 spread)?
Thanks,
Jake
The 10w makes sense...lower rating means oil flows thinner at low temperatures. Therefore better lubrication at startup when it's freezing.
30 vs. 40?
40 weight is thicker (not sure how much more), but not sure what the advantages are. Less oil consumption with the 40? Better for old and loose engines? Does the 40 provide better protection and more cushion/compression against metal?
What advantages/disadvantages are with 30 weight?
Is there a problem stretching the oil viscosity chains from 10-30 to 10-40 (differences of 20 vs. 30 spread)?
Thanks,
Jake