Thread: Ultra 250 SC in 120 degree heat
08-10-2007, 11:55 AM #1
- Join Date
- Jul 2006
Ultra 250 SC in 120 degree heat
Next week I will be riding in 120 degree heat. The manual says I should be using 20-50w oil in this kind weather. Have any of you had 20-50w in your engines? How'd it run? thanks. jb
08-10-2007, 12:27 PM #2
I dont run 20-50, but i rode the other day , it was 106* and humid, i was down @ 200-250 rpms, was running 7550 to 7600.
08-10-2007, 01:00 PM #3
- Join Date
- Jul 2006
08-10-2007, 02:54 PM #4SeaDoocerGuest
We were in Havasu last month and it was 124 degrees one day..and the heat hit your face like a sand blaster...never had a problem with ski not running good.
08-11-2007, 09:08 AM #5
I run 15/50 W Mobil 1
I run the heavier viscosity here in FL. I'd run
it in any air temps over 80. The OEM is probably
adequate but why not go to higher vis?
Now that I've heard about this oil dilution I like a
thicker oil in there.
If you've ever looked at those temp/viscosity charts
those 5 and 10w oils protect you to like -30 degrees
Farenheit. If you're JetSkiing in those temps you
are probably drinking so much liquor that it won't matter
08-11-2007, 05:21 PM #6SeaDoocerGuest
I couldn't agree more. This next oil change I will go with the 15-50 myself..it certainly won't hurt except cut down on speed by maybe 1% or 2% from what I've been told..not much of a sacrifice for better protection.
08-11-2007, 05:48 PM #7
doubt speed loss
I really doubt you'll see any speed loss. Remember
it still pours good at 75 degrees. So when a motor
heats up, it'll offer no resistance. In fact since it is
a synthentic it for sure offers less resistance than dino
It also is a combination of viscosities, including 15W.
Mobil makes this one for turbo and supercharged engines.
They know the motor environment of a high performance
motor most likely running in summer temps.
BTW, Costco sells it by the case of 6 for $30. Hard to beat
for a top of the line syn.
08-12-2007, 01:49 AM #8SeaDoocerGuest
Off I go to Costco tomorrow!
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