|Posted: October 29 2007 at 18:45 | IP Logged
RingFree was created for Yamaha by Chevron for the HPDI motors due to the oil burning and their o2 sensors. It made sense to carry on the recommendation for the 4-strokes to ensure clean combustion chambers and fuel injectors, and a continued revenue source. The actual requirement for the F-series motors is way over blown.
BTW, Amsoil makes an outstanding product called PERFORMANCE IMPROVER, it's a fuel conditioner and carbon remover with super detergent properties. It's $6 for a bottle good for up to 40 gallons of gas. A lot of us Yam 4-stroke owners are using it along with their outboard motor oil for 4-strokes, and their gearlube. I know, Amsoil blah-blah-blah - it's great stuff though. A fuel preservative is recommend if you have any E-10 in the tank and will store for more than 6-8 weeks.
BTW, the service requirements on those engines are well within a talented DIY'er's capabilities. About the only thing a dealer might be required for is a valve clearance check which can be done about every 400 hours, and replacing the cam belt which is done about a thousand hours. I just did the 100 hour service and it's a piece of cake. Plugs are good for a couple hundred hours at least. Same thing there, from the 2-smoke days they recommend a remove and clean every 100 hours. But you'll find them like new in that length of time.
Another BTW, only use a OEM oil filter, the Sierra filter is not the same quality. Andy at SIM is a great source for parts if you want to mail order at a discount.
'06 Grady-White 208 Adventure