Big Z wrote:No modern car (post 1990) in the US uses 20W50 oil.
And the US gets to both hotter and colder temperatures than Trinidad.
So, stick to the owner's manual or service manual.
1) Don't E92 BMW M3's use 10W60
wt oil - factory fill? That's THICKER than a 20W50. And that car is "in the US
". I could be wrong...but I'm pretty sure they don't use *W30 oils in the M3, and that car is sold "in the US" (notice you did not say a US BRANDED car).
Guess the E92 M3 must be ancient then.
2) Take a read of this:http://forums.nasioc.com/forums/showthr ... schaeffers
3) MOST USDM subaru owners move up to a 5W40 or 10W40 after their 30k MILE service. Rotella 5W40
is actually the oil of choice for most owners in the southern states running anything over stock hp, and some degree of mileage on them.
4) Also keep in mind that the owner's manual for these cars says that thicker oil visco should be used for severe service
. If the car is MODIFIED, considering it's MILEAGE, then I would hardpressed to recommend a 30W oil.
5)In fact, I'm willing to bet using a 10W30 leads to a pretty amt of burnoff if that car is driven with any amount of vigour (the EJ205 is notorious for blowby at higher mileage).