Honda Canada: 5W-30, Honda UK: 10W-40

[Ferrari]

I've looked at the Honda UK oil recommendations for my car (2001 Prelude 2.2L VTEC) and they recommend 10W-40 to be used in this engine. Honda Canada recommends 5W-30 for the same engine. Obviously the bearing clearances are not an issue with 10W-40 otherwise Honda UK would not recommend it. Apart from a slight decrease in fuel economy and power, are there any disadvantages in running 10W-40 (Amsoil 10W-40) in this engine? Would the engine run hotter or cooler with a more viscous oil? I'd only run it in summer here in Toronto, going back to 0W-30 in winter. Also, is it OK to keep changing oil viscosities? I've heard it's best to choose one oil and stick with it.

 

[satterfi]

Here's a close up pic of the Honda branded oil for cars they sell in Asia.

 

[Dick in Falls Church]

Ferrari- The 10W-40 AMSOIL will be fine all year. So would the 10W-30, or the 5W-30, or the 0W-30.

 

[The_Oz]

I wouldn't really recommend a 10W for car that will be operated in Toronto (I'm sure Patman will disagree ). Maybe a 5W40 weight might be a good alternative during winter climates. Regards, Oz

 

[satterfi]

quote:

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Originally posted by The_Oz: I wouldn't really recommend a 10W for car that will be operated in Toronto (I'm sure Patman will disagree ). Maybe a 5W40 weight might be a good alternative during winter climates. Regards, Oz

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It depends on whether it's a dino or syn. I'd rather have a 10w40 syn at -30F than a 5w30 dino in cold temps.

 

[Patman]

quote:

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Originally posted by The_Oz: I wouldn't really recommend a 10W for car that will be operated in Toronto (I'm sure Patman will disagree ). Oz

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For my pushrod V8 I think 10w30 is fine, it starts up no problem in 0F weather. I wouldn't recommend it for a DOHC engine though. I'm beginning to open my eyes to the benefits of 5w30 in those situations.