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Post by Simar on Aug 27, 2006 17:03:27 GMT
Ok just purchased 2 new scoots a Giantco 50cc and a Kinroad 125cc, the dealer suggested I change the engine oil as the Chinese oil in the engine for shipping isn't very good.
My wife passes our local Yamaha dealer on her way to work so I asked her to get me 2 litres of 10w40 4 stroke engine oil, anyway she comes home with 2 stroke oil, so next day off she goes back to get them exchanged, the dealer has a quick chat with the mechanic as he's not sure what oil to give her, anyway the mechanic said "for all our scooters we use Castrol activo synthetic scooter oil 5w40"
So I have changed the oil in both scoots but have just read this in motorworks.
*Important Note*
A fresh cylinder wall needs some medium to high engine loading to get the piston rings to seat properly for good compression. Use high quality, low viscosity oil (Valvoline 30 weight) for the first 500 miles. Do not use synthetic oils, as they are too slippery. If synthetics are used during initial break-in, the rings will glaze over, voiding your warranty.
Now I'm not sure if this is for 2 strokes only as the article wasn't to specific.
Any ideas?
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Post by enu06 on Aug 27, 2006 18:25:29 GMT
The engine oil they come with is o.k for partial running in, then use a decent mineral oil for the next 2 oil changes as fully synthetic is too protective, it will stop the rings from bedding in. If you use synthetic from the start you may worry that you are burning off your oil, this will be because the rings are not bedding in and the swirl marks in the bore of the cylinder are being protected from wear by the oil. I would say after the 1st 3 changes you would be looking to protect your engines longlivety so use fully synthetic from then on. Dont buy the expensive motorcycle oil, no need for that, I use BP visco 5000, or simular which is fine for these little engines.
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Post by Simar on Aug 27, 2006 18:47:22 GMT
Ok i'll take the synthetic back out. Is visco 5000 not a car oil?
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Post by Simar on Aug 27, 2006 19:03:33 GMT
Below are the conclusions to a scientific test done on motorcycle v car oil test for Motorcycle News a few years ago.
MCN's Conclusions
In speaking to a number of people involved in the production, marketing and distribution of motorcycle-specific oils, we could not find anyone who could present a valid argument for discrediting the testing done by Dr. Woolum. In general, they all tried to turn the conversation another direction by bringing up other possible advantages to using their products, while ignoring the viscosity-retention question. Yet without exception it is their own advertising that consistently brings the subject up, touting the special shear-stable polymers as the primary reason motorcyclists should purchase their products.
It is this practice to which we take exception, as we have been unable to find evidence to support these claims. In short, it seems to be nothing more than a clever marketing ploy designed to enhance their products' image and separate motorcyclists from their money.
MCN is ready to print any research or test results provided by the oil companies to support their claims of superior viscosity retention, with this one proviso: The comparisons must be against actual, SG-rated oil products that can be purchased off the shelf at the average auto parts store. Tests against generic, basic-stock mineral oil or against the lower-rated SE and SF oils would lack any credibility in a real-world context.
Despite more than six months of research, reading all the claims and counter-claims printed by dozens of industry experts and lubrication experts, MCN cannot and does not purport to know all there is to know about the differences between automotive and motorcycle oils. However, what we do know is that we can find no substantive evidence that using a high-quality, name-brand automotive oil in an average street motorcycle is in any way harmful or less effective in providing proper lubrication and protection than using the more expensive, motorcycle-specific oils.
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Post by enu06 on Aug 27, 2006 19:18:02 GMT
Upto last year I had an 02 Aprilia RST 1000 V twin from new, and from the 'free' 1st service on I serviced it myself useing Valveoline fully synthetic 'car' oil with no problems what so ever, the valve cam gaps never moved from original, and after 27000 hard driven miles there was not a knock or tap to be heard. As far as I can see, the only difference between car and bike oil is 1 is 3 times the price, guess which one. Then one key to all of this is keep to the regular advised service intervals and you should have no problems. I have yet to hear or see of an engine failure due to oil, more likley due to the lack of it!
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Post by civvy on Aug 27, 2006 20:09:01 GMT
Well said, yes i am truly also a believer of intervals rather than over priced oils. Again, spirited riding but, concerned more about flow over pressure.
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Post by allmightyme on Aug 31, 2006 22:41:51 GMT
The engine oil should have only the specification 10w40 4tact engines(cars etc.), or it should be noted that oil is special for scooters 4 tact.
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