which oil should i run?? 10w-40 or 20w-50??:dunno
Negative.... you are talking about AMSOIL it will be Product Code MCF which is 10W-40. The filter for all late Suziki's is EAOM-109.
20W-50 will cause lack of lubrication at start up, loss of HP and Fuel Mileage.
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If it were me. Living in Az and especially in an older bike. I would use 20/50. Unless your using Amzoil or another select few oils. Like the sponsor stated, some manufacturers include different additives to oils to enhance different lubricating aspects. Therefore with their specific oil, it might be best you stay at 10/40. With very warm climates and using some oils that aren't rated highly with those extra additives. I'd go with 20/50 during warm tempatures. All you have to do is look at your manual. If states at what temperatures it's safe or better recommended to use one of the two different viscosity oils depending on the current temperatures for the climate you live in. Not only will your manual state it, so will the back of every bottle of oil you will ever buy. One important consideration supposedly, is that an oil is wet clutch compatible on a motorcycle. Many people have been known to run oils that are not for thousands of miles and have never received any cluth slippage or failure. Myself included. In the end it all boils down to what you prefer and what you're willing to spend. Personally, I'd worry a little more about oil levels and interval changes in comparison to what brand oil I may choose.What about the older bikes? Like I have a 89 GSXR 1100 Air/Oil Cooled. I live in AZ where its starting to get 90 out. And later in the summer it be at around 110's. Would you still use the 10w - 40 or 20w - 50? I read above but I got a bike that 1 runs way hot plus outside temps are just as bad
All manuals are written with a CYA assuming that people will run the cheapest crap that they can find. Why anyone would spend thousands of $$$$ on something and then try to save $2.00 is beyond me but they do.Suzuki have a chart in the owners manual that specifies what weight of oil to use based on temperature. 20w-50 is included for higher temperature ranges. Some 20w-50 oils are heavier than others. Mobil V-Twin is close to a 60 weight.
However Bob from Amsoil is recommending not to following Suzuki factory recommendations when using Amsoil.
Bob is Amsoil MCV a thick 50 weight?