Does anyone out there know anything about Valvoline syn. blends? -Pete --- "Crisler, Jon" <[EMAIL PROTECTED]> wrote: > Castrol 5w-50 is one of the worst oils you can use > on any bike that shares > engine oil with the transmission. > > First, it is NOT a true synthetic like Amsoil, > Mobil 1 or Motul, but due > to pressure from the Castrol company it was > able to take advantage of a loophole and allowed to > include the label > "Synthetic" for marketing. I will try to find some > info on that, as I > recently discovered this marketing/legal loophole by > accident. > > Second, that oil has a very high quantity of > viscosity improvers, which is > one of the first additives to break down under high > shear-stress levels as > found in motorcycle transmissions. The oil starts > life as a 5w oil, and the > heavy addition of viscosity improvers (VI) is what > allows it to reach 50 > weight, at least until it gets some mileage on it. > It then rapidly degrades > back down to about a 5w20 to 5w30 with use. Most > better synthetics have > little VI, some like Amsoil have none at all. This > means that the base oil > is of high quality and can meet the 5w rating at low > temps, and 30 rating at > high temps, without any VI additives at all. Same > for Amsoil 20w-50, no VI > additives. > > Castrol 5w-50 (it used to be known as Syntec in the > U.S.) is about as good > as a premium petroleum 5w-30 oil, but does not > compare in most catagories to > even the cheapest true synthetic oil. > > Due to this legel/marketing loophole, both Mobil > and Amsoil are going to > start marketing a cheaper "econo-synthetic" or > "synthetic blend". The > Amsoil XL-7500 formulation (their cheapest oil) will > be changed to take > advantage of this formulation, and the price lowered > significantly to > compete with other similar types. > > > Now, dont take this as "buy Amsoil idiot", but > rather "avoid Castrol > Syntec 5w-50". You would be much better off with > Mobil 1, Motul, Amsoil, or > any other true synthetic (other than Ams XL-7500) > than Castrol. > > -----Original Message----- > From: Sail Kim [mailto:[EMAIL PROTECTED]] > Sent: Monday, December 09, 2002 2:08 PM > To: [EMAIL PROTECTED] > Subject: Re: Amsoil and D220 tires > > > If a bike uses separate engine oil like BMW, Moto > Guzzi or HD, light oil > make sence. However, for Japanese bike, we need oil > to balance engine and > transmission need. I use Castrol 5W-50 synthetic on > all of my Japanese > bikes. > > >>> "Crisler, Jon" <[EMAIL PROTECTED]> 12/09 10:53 > AM >>> > Generally speaking, you are absolutely correct. But > my example was meant to > say that if the application called > for a 10w30 oil, and you use a 5w20 oil, or even a > 0w10 oil or straight 10w > oil, then you should expect higher > rates of wear. > > In a race engine that is rebuilt after every major > race, this is factored > in to the design and specs of the engine. > > Further, I read the FAQ in your provided URL, and > while generally > informative I would have to discount some of what > this guy is saying. > > Also, anybody that recommends straight 30w oil (as > in the FAQ) in a street > car is seriously out of touch. The last car I ever > saw that recommended 30w > oil was a 1981 Pontiac Turbo Trans Am (301 turbo), > and everybody knows what > a POS that engine was..... > > -----Original Message----- > From: Loss, Joe [mailto:[EMAIL PROTECTED]] > Sent: Monday, December 09, 2002 1:23 PM > To: [EMAIL PROTECTED] > Subject: Re: Amsoil and D220 tires > > > It's not correct to assume use of thinner oils > equates to higher rates of > wear. In fact the reverse can be true. Lubrication > is a well-understood > science and every application has different optimum > lubricant viscosity > requirements, depending on the load, surface > velocity, clearance and > temperature range. > > See http://www.salemboysauto.com/faqs/faq-29.htm for > further explanation. > > Cheers Joe. > > > -----Original Message----- > From: Crisler, Jon [mailto:[EMAIL PROTECTED]] > Sent: Monday, December 09, 2002 10:58 AM > To: [EMAIL PROTECTED] > Subject: Re: Amsoil and D220 tires > > > I can understand why your bike might feel a touch > down with a heavier oil. > But that is why everybody makes different weight > oils. It is a common > horsepower trick to use a lighter oil to get a few > more HP on race cars, and > has long been used by > Nascar, F1 and Indy car racing. If you did not like > a 15w50 or 20w50, then > why not try a 10w40, which is in fact the > recommended viscosity. > > Lighter oils tend to trade higher wear rates for > better HP and fuel > economy. Both Honda and Ford are going to 5w20 oils > for better fuel > economy. Oils and engines are getting better, so > it is now possible to > build a engine that will last 100k miles while using > 5w20 oils. But I doubt > you could get it to last 200k or 300k.....:) > > ============================================================================ > ========== > NOTICE - This communication may contain confidential > and privileged > information that is for the sole use of the intended > recipient. Any viewing, > copying or distribution of, or reliance on this > message by unintended > recipients is strictly prohibited. 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