Hawaii weather/warmer weather 5w30 oil
 

Hello everyone, I had a question on the grade oil to use for the frs/brz.

I live in Hawaii and the average high temperature is 84 degrees Fahrenheit and the average low is 71 degrees Fahrenheit.

Will the manual recommended 0w20 oil still be good in this type of warm weather?

Could I possibly use 5w30 oil in this situation and not damage the engine or parts that need lubricating?

Thanks!

84F isn't that hot IMO. you probably won't need 5w30 unless you're racing your car or if you do a lot of driving in traffic in weather 100+

though, I do use 5w30 since it gets well over 100 in the summer here and around 120 in august. I use 0w20 all the other time.

Can you define racing conditions? I plan on doing some hard pulls but no actual track racing.

Also, does 5w30 warrant the voiding of warranty?

Thanks!

ryoma is probably referring to track conditions.

The owner's manual does have language that says that thicker viscosity may be used in certain conditions, but it doesn't define the viscosity. Check the manual for further details.

Depending which 5W30 you are referring to, you may not be gaining a thicker viscosity since many 5W30's will shear to a 20 weight anyway.

A 5W20 is probably a more stable oil. A 0W20 and a 5W30 can come from the same base oil. Pour point depresents are added to 20 grade base oil to improve cold weather starting and viscosity modifiers can be added to 20 grade base oil to thicken it up to a 5W30. Under hard use, a 5W30 may shear to a thinner viscosity than a 5W20.

Used oil analyses have shown that a lot of 5W30 owners are driving around on xW20 oil.

The cold cranking viscosity of a 0W oil is tested at -35C and the cold cranking of 5W is tested at -30C. http://www.pqiamerica.com/coldcrank.htm

I see no benefit to running 0W anything in HI. It might give you .05% better fuel economy during the first 1 minute of driving in winter temps of 65F, that is about it. :D

The most I would go is a 30 weight for NA. A 40 weight would probably be detrimental in the long run unless you're FI. And by racing, I do mean tracking your car where your engine is under heavy load for a period of time. Doing pulls on the street isn't the same but is still a little above the average street driver.

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Thanks!

So you probably would use 5w-30 in my hawaii conditions? But can't go wrong with 0w-20?