mbz560

the car manual states 5-30w and that's for below 0 degrees and over 90 plus degress, if i remember correctly. my question since i live in san diego, ca where the temp is 40 in the winter and 90 in the summer can i use 10-30w?

i just did my first oil change and did the 5-30 mobil 1 synthetic. is there any harm in doing the 10-30w.

fyi the costco's in the san diego area have a 10 dollar off coupon for mobil 1 5-30 and 10-30. thanks for the help

door331

5w30 is the "recommended" in my owners manual but it also lists 10w30 for warmer climates. I would not see any issues using the 10w30 but I guess the real question is Why do you want to use the 10w30? do your summers get really hot??

LScowboyLS

YES!!

Toyota states in your Lexus factory service manual that 5W-30 is preferred for temperatures below100°F, but that 10W-30 is perfectly fine if you live in temps that stay above 0°F

reference: 1996 Lexus LS400 factory service manual - page EG-217

The record high temperature at the National Weather Service office in San Diego was 111 °F (44 °C) on September 26, 1963. The record low temperature was 25 °F (−4 °C) on January 7, 1913 - for this reason, I would use 10W-30 if I lived in San Diego

Dawa

iTrader: (5)

+1 if you live in a warm climate area (cali) [you can] run 10 starting weight. i do.

PureDrifter

iTrader: (10)

I run 5W-40 Shell Rotella T6 and love it to death.

I live in socal as well, was 108 last week and 55 today

imherenow

on my volvo s80 too has 2 options depending on outside temp. The manual says if its hot then use 10W30 and if cold then 5W30. So right now i am using 10W30. But there is no problem if one uses 5W30 all year long too. Just follow what the manual says. thats all