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Old August 12th, 2017, 08:24 PM   #41
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Are you on Bob is the Oil Guy?
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Old August 13th, 2017, 04:55 AM   #42
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Originally Posted by kuksul08 View Post
Are you on Bob is the Oil Guy?
Like I said above, every few years I dig into the specifications and test results so as to be able to make an informed purchase decision.

The oil guy site is helpful too.

BIG changes coming to oil formulations by 2019. It will be interesting to see the updated test results.
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Old August 14th, 2017, 09:44 AM   #43
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A little off topic, but I was shocked to find the Shell Advance 4T on the shelf at AutoZone. I visited half a dozen Duc shops in the years since I purchased my bike and none of the carried it. I went with Amsoil because I trusted my original shops recommendation. Recently used the Shell because I couldn't find Amsoil as readily.

I was on another thread that warned against the Mobil 1. Narrative was it was developed for slower spooling cruiser twins. It was not accompanied by ASTM data. That bums me out, because I'm a devoted Mobil 1 fan for my cars.
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Old August 14th, 2017, 10:19 AM   #44
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A little off topic, but I was shocked to find the Shell Advance 4T on the shelf at AutoZone. I visited half a dozen Duc shops in the years since I purchased my bike and none of the carried it. I went with Amsoil because I trusted my original shops recommendation. Recently used the Shell because I couldn't find Amsoil as readily.

I was on another thread that warned against the Mobil 1. Narrative was it was developed for slower spooling cruiser twins. It was not accompanied by ASTM data. That bums me out, because I'm a devoted Mobil 1 fan for my cars.
Yeah Mobil 1 20w-50 twin oil is not designed for these high revving engines, I wouldn't recommend using it either. On the other hand, RSL is a borderline petroleum engineer, so we should all take his recommendations and run ATV/UTV oil.
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Old August 14th, 2017, 10:29 AM   #45
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I'm going to continue with the Dirt Bike oil. Coming from off-road, I know the abuse enduro and MX bikes take. Good enough for them, perfect for me.

I understand the trade-off being more frequent oil changes. Not that I would ever ride a bike 9,000 miles with the same oil.

It seems strange that people discussing oil offer conclusions without information to demonstrate their assertion. Seems emotional rather than informed. My analysis of the attached test results, oil manufacturer specifications and Owners Manual pages may be all wrong. That said, my conclusions are based of an analysis of the attached information, over a lot of years of looking at similar data, and without emotion.

Last edited by RSL; August 14th, 2017 at 11:01 AM.
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Old August 14th, 2017, 10:32 AM   #46
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Blending two 10w-40 Mobil 1 4T with one 20w-50 would yield 16.3 viscosity. Allows one to get into the zone for viscosity and use Mobil 1.

The slow reving matter relates to viscosity. Solved by the blend.
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Old August 14th, 2017, 05:35 PM   #47
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Quote:
Originally Posted by gatdammit View Post
A little off topic, but I was shocked to find the Shell Advance 4T on the shelf at AutoZone. I visited half a dozen Duc shops in the years since I purchased my bike and none of the carried it. I went with Amsoil because I trusted my original shops recommendation. Recently used the Shell because I couldn't find Amsoil as readily.

I was on another thread that warned against the Mobil 1. Narrative was it was developed for slower spooling cruiser twins. It was not accompanied by ASTM data. That bums me out, because I'm a devoted Mobil 1 fan for my cars.
My guess - an air cooled slow revving twin, beats the hell out of oil more than a fast revving watercooled twin. Some of those Cruisers have to go into "parade "mode because of heat dissipation issues. I think one cylinder deactivates, and American flags emerge from the mirror stalks.
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Old August 14th, 2017, 06:28 PM   #48
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I think cruisers need thick oil because of the 1930s tech.


What will be interesting is how the specifications change with the V 4 engines. Maybe a VW influence? Maybe 0w-20 oil? Euro 5 engine? European cars are at Euro 6 now, aren't they? 4 way catalytic converters and all.

Thinking more about it, Germans have determined that the 500cc combustion area is the perfect size. So, the new Ducati V4 would have to be a 2 liter bike to meet that determination. So, the design must be Ducati alone.

Last edited by RSL; August 14th, 2017 at 10:31 PM.
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