Quote:
Originally Posted by 86TOYO2k17
So to be clear it does not specify or list 5w-30 is a recommended spec?
it says a higher oil (doesn't specify what weight) can be used in extreme situations like tracking. Last time i checked daily driving isn't extreme.
Also that entire section is an example explaining what oil weight is/means not necessarily specific to the vehicle either.
In the section before that, that is specific to the vehicle it clearly states.
recommended viscosity 0w-20 (no other weight listed as recommended such as 5w-30)
and states
If 0w-20 is not available 5w-20 may be used (doesn't say 5w-30), but MUST be replaced with 0W-20 on the next oil change (indicating its not ideal but an alternative in a pinch).
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Daily driving in severe stop-and-go traffic such as in large cities with short distance, long time commutes (eg. LA, NYC, Seattle, Chicago, etc.) is an extreme use, so depending the OP’s location daily driving could justify heavier oil. Once he finishes sorting out his abundance of problems and installs the supercharger, being boosted would also justify thicker oil.
As Rtoyo posted, the manuals from non-US vehicles recommend various weights up to 10w-40 depending on use case. The engines are the same.
15w-50 is a way bit heavy for much use this side of track days in Arizona during the summer, but anyone that understands oil rating knows that 0w, 5w, or even 10w are completely fine depending on what type of “Winter” the vehicle is operated in. As for the operating weight, 20 is the general recommendation in modern vehicles to improve fuel efficiency and reduce emissions, but the use case and conditions are going to dictate whether 30+ are better choices.
Also remember the manual is written for the lowest common denominator, and in the US the low is pretty low (we’ve all seen the idiotic product warning labels), so telling people to use one specific oil is easier that expecting people to make a properly informed decision.