GON
$100 Site Donor 2024
I live in Salt Lake City and drive about 100 miles round trip per day, most interstate, and go over a mountain pass with pretty good changes in grade twice per day. I go through a lot of oil changes, and euro formulated oils are sometime hard to find, and rarely on sale. Costco has M1 on sale right now, but my local Costco does not stock the Euro formulation M1. I drive a 2005 S500 with 175k miles, also have a 2006 s500 4matic with 5ok miles, I only drive the 4matic in really snowy conditions as it's fuel mileage is about 25 percent less than the rwd version (likely because the RWD has seven speed trans, the 4matic only 5 speed).
I was able to purchase a qty of Pentosin Euro 5w30 for $2 a quart. I have been doing a lot of reading, and it suggest 5w30 is ok for city driving, but high speed over mountain passes- the 0w40 or 5w40 should be used.
Any thought son using the 5w30 instead of the 5w40 in my S500 specked for 5w40?
I was able to purchase a qty of Pentosin Euro 5w30 for $2 a quart. I have been doing a lot of reading, and it suggest 5w30 is ok for city driving, but high speed over mountain passes- the 0w40 or 5w40 should be used.
Any thought son using the 5w30 instead of the 5w40 in my S500 specked for 5w40?