Break In Oil

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It’s been a while since there was a good oil thread.

There are some older posts about engine break in oil but then I ran across this stuff.

Royal Purple Break In Oil

On my 750 I think I just used cheap Dino oil. The next time I start up a fresh engine I’m wondering if the Royal Purple stuff would be better?
 

Scout63

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I broke mine in with Redline. The Royal Purple writeup is pretty convincing. Too late now but I think I will use it on my Guzzi build.
 
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I use Castrol Go 20w/50 motorcycle oil. Rated SG, dino. Don't use anything rated higher than SG. Most autoparts stores carry it. Change at 100, change at 1000 with new filters each time. After that switch to synthetic if you want.
 
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On my 750 I switched out the dino for Royal Purple synthetic after 250 miles. And obviously a new filter. It should be good enough.
 
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Castrol XL 20-50 for me for the running in period then onto Mobil 1 V twin
 
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I made the mistake of not using Breakin oil. And had to ring it again. Funny thing though, cheap oil worked on one bike but not the other.
 

Fast Eddie

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In Comnoz’ oil test thread he tested some known good additives, with known good oils, and they performed WORSE than the oil alone.

The days of me adding ANYTHING to my engine oil are long gone ...
 
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I just used plain ole Mobile 1 v twin.
WARNING; Mobile 1 is a synthetic motor oil and whilst fine for a Guzzi or any bike with a dry clutch, I would avoid like the plague for any engine with a wet clutch.
P.S. don't shoot the messenger.
 

Fast Eddie

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WARNING; Mobile 1 is a synthetic motor oil and whilst fine for a Guzzi or any bike with a dry clutch, I would avoid like the plague for any engine with a wet clutch.
P.S. don't shoot the messenger.

Mobil 1 v twin synthetic did not fare well in Comnoz’ oil testing. However, regarding its wet clutch compatibility, here’s an exert from the link below about Mobil 1 v twin synthetic:

“With its enhanced high-temperature durability feature, the oil offers outstanding protection to air-cooled engines that are hotter than other engine types. It provides the exact frictional characteristics needed in a wet-clutch engine/transmission system. The oil has been fully tested on both laboratory dynamometers to lubricate engines well and provide optimal horsepower and acceleration in the field“.

 
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Mobil 1 v twin synthetic did not fare well in Comnoz’ oil testing. However, regarding its wet clutch compatibility, here’s an exert from the link below about Mobil 1 v twin synthetic:

“With its enhanced high-temperature durability feature, the oil offers outstanding protection to air-cooled engines that are hotter than other engine types. It provides the exact frictional characteristics needed in a wet-clutch engine/transmission system. The oil has been fully tested on both laboratory dynamometers to lubricate engines well and provide optimal horsepower and acceleration in the field“.

In my and other peoples experiences with wet clutches, I would take the above with a very big pinch of salt. So, I suppose you are now going to say that you have tried it inside your British iron chaincase?
 

Fast Eddie

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In my and other peoples experiences with wet clutches, I would take the above with a very big pinch of salt. So, I suppose you are now going to say that you have tried it inside your British iron chaincase?

Nope, I’m not gonna say that.

My only wet British clutch is running in Bel Ray V Twin Synthetic 10w50... (cos I’ve not got around to fitting a belt to it yet).

I’m not really sure where this clutch worry comes from in people, my guess is that people used synthetic car oil, or some such, in the past and that caused their clutches to slip (clutches that were perhaps already old and worn out)?

Almost all modern bikes, inc sports bikes, run wet clutches. So almost all modern synthetic MOTORCYLE oil is most definitely suitable for wet clutches. Synthetic CAR oil is almost certainly NOT suitable for wet clutches.

As LAB pointed out in another thread on this matter recently, look out for JASO MA on the package, that means its clutch friendly. Or JASO MA2, that means it’s clutch and catalytic converter friendly. Note: some clutch friendly oils do not show these ratings, but it is a good guide nonetheless.
 
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WARNING; Mobile 1 is a synthetic motor oil and whilst fine for a Guzzi or any bike with a dry clutch, I would avoid like the plague for any engine with a wet clutch.
P.S. don't shoot the messenger.

The branding is an issue, people may assume all Mobile 1 is the same. It has to be very specific Mobile 1 for a wet clutch. We like to think people don't make mistakes but there are just one too many examples to prove this is not the case. ;)
 

Fast Eddie

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The branding is an issue, people may assume all Mobile 1 is the same. It has to be very specific Mobile 1 for a wet clutch. We like to think people don't make mistakes but there are just one too many examples to prove this is not the case. ;)

That’s a fair point, not only do you need carefully check that you order the right stuff, you also need to check the seller sends the right stuff. I’ve had a seller send out the wrong oil before.
 
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The branding is an issue, people may assume all Mobile 1 is the same. It has to be very specific Mobile 1 for a wet clutch. We like to think people don't make mistakes but there are just one too many examples to prove this is not the case. ;)
Fair point, but if you look at the history Mobile 1 was originally developed for car engines.
 
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