Sportster-2001-951C-Stock
Well-Known Member
I wouldn't use Amsoil either, I like NAPA branded oil. NAPA oil is used by many fleet operators.
Again I am no expert on seadoos, but I know how to read and research. AMSoil put up a pretty evidence that their Synthetic is approved for our application SC or not. Seems Legit. I downloaded the bulletin somewhere if you want to see it. Its AMSoil wcf 10w 40. According to AMSoil's Lab work, Seadoo employs the common technique of blanket "only use our oil or your engine will explode" statements.
What lock nut? There is an adjustment nob on the bottum of the handlebars but I loosen that all the way and it still tight.
re oils...synthetic...amsoil...brp.....fred-n-barney's...
As long as it's wet clutch applicable...all will be well...hence the save yourself a few bucks advice towards the valvoline 10w40 4stroke motorcycle oil. Buy it on sale at crack-auto in the spring for $2.99-$3.99 a quart...otherwise it's $5-$6 regularly. Toss in an over priced filter and set of o-rings and an oil change will cost the do-it-your selfer...$30-$35.
1/3 the cost of the stealership.
I already bought 4 quarts of Amsoil 4 stroke marine, for $8 each. Their website site bulletin report states it's safe in use in Seadoo's with superchargers and if the oil causes failure they'll pay the damages.
You willing to test out that theory? Let us know how that turns out for you. They'll take the failure and blame it on the SC washer by design and you're left with a blown SC and motor and a good story to tell.
I simply ask myself if AmsOil is certified to meet the oil spec'd for the engine in the manufacturer's product.
Just as I can understand that synthetic oils may not have the proper friction modifiers in the additive package for the wet clutch on the SC'ers. Many superchargers have their own reservoir, which is independent of the engine oil.
I'm sure I read in that "update" that in Seadoo's case (at least the 2004), the SC oil is from the engine oil reservoir. Not sure about
other years or makes. I just find it a bit WTF that they make it so ambiguous really - and most of the issues centered on Seadoo
screwing up with the ceramic washers...
It's better to ask questions that to find out something the hard way. I've personally used both the BRP filter and k&n filter with good results. I mainly use the BRP due to cost. My local dealer here that's a mile away charges $12.xx for one.