Engine Oil

[mguin]

BRP is 5W 40, AMSOIL recommends 10W 30 and some places suggest 20W 50. Can anyone share perpective on best choice of oil for a 6,000 mile oil change on a 2009 SE5?

Thanks,

Bluezr0kr
Chandler, AZ:doorag:

 

[boborgera]

BRP is 5W 40, AMSOIL recommends 10W 30 and some places suggest 20W 50. Can anyone share perpective on best choice of oil for a 6,000 mile oil change on a 2009 SE5?

Thanks,

Bluezr0kr
Chandler, AZ:doorag:

I'll throw another one in' All i use is 10 40 For wet clutch, The brand doesn't matter to me as long it's full Synthetic.:dontknow:
08 Sm5 17,000 Miles.

 

[BajaRon]

BRP is 5W 40, AMSOIL recommends 10W 30 and some places suggest 20W 50. Can anyone share perpective on best choice of oil for a 6,000 mile oil change on a 2009 SE5?

Thanks,

Bluezr0kr
Chandler, AZ:doorag:

Ah yes, another Oil Thread! And I am really a sucker for these. I'm always hoping education will some day win out over Marketing. But so far I've been wrong.

BRP recommends 5W-40 oil but you'll notice that there are no viscosity designations on the oil they sell. Here are some possible reasons for this.

1- The Castrol Blended oil ,that BRP is probably using, is 10w-40
2- 5w/10w is not a critical factor
3- Not putting a viscosity on the bottle allows BRP flexability to change the oil inside without having to change the bottle

I don't know that Amsoil recommends 10w-30. I have not heard this. I recommend the 10w-40 for the simple reason that 40 weight is better for the transmission gears.

Engines are not nearly as hard on an oil as transmissions are. The forces created between the transmission gears is much greater and requires more from an oil than engine componets.

Now if you run in consistanly colder temperatures then 10w-30 would make sense. 20w-50 will work well but it is thicker than needed for the Rotax engine. Thinner oil flows more quickly at engine startup and transfers heat better than thicker oil.

Everything is a trade-off. What you're looking for in oil viscosity is the sweet spot between too thick and too thin. For most people 10w-40 is that sweet spot. But either the 10w-30 or 20w-50 will also work just fine, in most cases.

 

[mguin]

Engine Oil Responses

Thanks everyone. I'm leaning toward the AMSOIL 10W 40. I appreciate the help.:doorag:

 

[Some Guy]

Thanks everyone. I'm leaning toward the AMSOIL 10W 40. I appreciate the help.:doorag:

I've been using Amsoil 10W 40 for 20,000 miles with no problems.

Oh, and I've also been using BajaRon's filters. etc. :thumbup:

 

[M2Wild]

I'll throw another one in' All i use is 10 40 For wet clutch, The brand doesn't matter to me as long it's full Synthetic.:dontknow:
08 Sm5 17,000 Miles.

:agree: and will just add ..... whichever one that fits the above description and cost the least.:2thumbs: