2008 Yamaha VX Cruiser - 20W40?

[ledslinger]

Book says 10W30 to 80F, 20W40 to 104F, 20W50 over 104F. SE, SF, SG, SH, SJ, SL. I assume 10W40 motorcycle oil is just fine for the 20W40 temp range. Likely 15W40 HDEO covers it also.

 

[lyle]

I've used both 10W-40 marine oil and 15W-40 diesel oil in my 2008's, got 2 of them. The Yamaha motor is pretty bulletproof on anything, and they're still running strong.

 

[bubbatime]

20W40 is really hard to find in America.

Walmart now sells 25W40 marine oil for a very good price. I'd probably just use that.

 

[gman2304]

I used Rotella 15w40 in my 2008 Suzuki Vstrom for years. It ran like new when I sold it a few years ago.

 

[Ursatdx]

I used the Yamaha 10w40 while under warranty.
Currently use Rotella T6 5w40.
99 FX SHO Cruiser 330 hours

 

[bubbatime]

Originally Posted by gman2304
I used Rotella 15w40 in my 2008 Suzuki Vstrom for years.


You do lots of boating on that thing?

 

[DoubleWasp]

If you have emissions, you'll do great with the Supertech 25W/40 sold at Walmart.

If you don't have catalysts in your vessel, just use a good 15W/40 like Chevron Delo. The Delo has a stronger additive package than the 25W/40 does.

 

[Arctic388]

Rotella 15w40 is a great PWC oil. I use Rotella T6 5w40 in my Seadoo's with no doubts its a great oil.