I live in So. California. Which is better to use and why? I use the regular dino oil. Any recommendations? I've read the Castrol GTX is good stuff. Does that high mileage oil do anything or is just a marketing gimmick? Oh, I have over 150k on my 1995 Maxima SE. Thanks!

 

use 10w30 i think the 5 is for colder degrees

 

ive been told that 5w-30 is for cars with less than 90k miles, but i could be wrong. you will get better answeres in the fluids section of the board.

 

i have 242,000 miles on my SE which I bought used with 65,000. Never used synthetic. Castrol GTX is what I use.

 

How about the mileage oils? Any benefits or just a marekting ploy?

 

curious about this too

 

You would want to use 10W30
Virtually all new passenger vehicles sold in the U.S. use either 5W30 or 10W30 oil. The difference between the two is that the 5W30 flows better when cold, so if you live in a cold climate or operate your vehicle in a cold climate during the winter months, you should use 5W30 if it is the preferred oil for your vehicle. If you live in a sub-tropical climate and don't operate your vehicle in cold climates, then 10W30 is acceptable as long as the manufacturer specifies that it is permissible to use it.

^^^^credit: Oil Myths

Some other good reads there too.....

 

Nissan recommends 5w30 year round I believe.

 

quaker state high mileage 10w30 in warm months, 5w30 high mileage in the cold months. Doubt it matters too much but I would like to believe so.

 

always had luck with GTX 10W-30...unless your getting noticible burnoff the hi mileage stuff isnt necessary.

 

10W30 is just slightly more viscous than 5W30, that's all. Also, the lower the temperature, the more viscous any given oil is. So if you're starting the car in cold weather you definitely want 5W30. Supposedly a more viscous oil offers better protection if you are rough on your engine but there's also the drawback of slightly reduced power and fuel economy (very slight), besides the warmer weather requirement.

 

Yo the new paint bumper, eye lids, and lip is looking fresh! Sorry to get OT but I just saw the sig and had to comment. looking hot


Respect!