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Old 03-21-2008, 05:15 PM
hwew hwew is offline
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Originally Posted by Bill Kapaun View Post
Amsoil ASE 10W-30/SAE 30 for one

A synthetic multi weight oil is similar to a straight weight oil by its nature.
Think of water. Pretty much the same viscosity from 33 to 211F.
This is all I use in my air cooled engines. lots of hours on some of them and they still do not use oil between oil changes.

Best spec's I know of for air cooled engines.
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Old 04-21-2008, 03:03 PM
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tacoma200 tacoma200 is offline
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Originally Posted by topsites View Post
I found this one quite useful as well

btw, I didn't care much for the PAO / synthetic oil explanation.
You just can't peg an engine's rpms to the governor indefinitely with conventional, I don't care who says what.
And until someone guarantees the cost of my engines, I will continue to run synthetic.
I'm with you I just switched everything over to synthetic.
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Old 07-08-2008, 10:34 PM
Joe McMo Joe McMo is offline
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Turfeater, please don't do that! Using 50wt. in a 30 wt. is awful. 30 wt molecules are a certain size lets say 30 microns/ 50 wt, oil has molecules that are say 50 microns/// too thick, you are forcing 50's in a space designated for size 30. You are wearing the engine out slowly this way.
The 10/30-30wt. amsoil small engine oil is full synthetic and is designed for that 30wt. classification.
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Old 07-23-2008, 11:23 PM
Precision Precision is offline
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Location: Cocoa Florida
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Originally Posted by Mark in MD View Post
I'm not sure, but I think it would a contradiction of terms. 30W I believe is by definition a straight oil with a viscosity of 30. My guess is they have not figured out how to make a synthetic that behaves EXACTLY like straight oil. I mean, if they did, from that maybe we could then make man-made gasoline, and to hell with the middle east.
We have been able to make synthetic gasoline since at least the 20's, Google Bergius process. During WWII, the Germans produced 92% of their aviation gasoline this way.

The process is quite a bit more expensive than our current $4.00 a gallon gas, so...
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Old 07-27-2008, 09:36 AM
lubricity lubricity is offline
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No matter who tries to teach you about oil. It is skewed to sell their brand of oil. We have been selling lube products fo 20 years. It is amazing how they cum up with rah rah bulls---.
Single wieght oils are basicly obsolete for land based craft.
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Old 10-07-2008, 08:07 PM
Dr. Godfrey Dr. Godfrey is offline
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Another great place of info on oil the simple man can understand is All based on easy tests.Again Schaeffer is a great proformer.
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Old 07-02-2009, 04:19 PM
Wizz Wizz is offline
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W indeed stands for Winter, not weight. I agree that bobistheoilguy is a great site, I've learned a lot just by reviewing the various oil analysis posted on that site.
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Old 05-05-2010, 12:20 AM
irishcreek95 irishcreek95 is offline
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Originally Posted by rpauls View Post
Have you tried the 15-50 mobile1 yet? What did you think? I am considering the same for my kohler which also calls for straight 30. Why is there no synthetic 30W?

My dealer told me to use straight 30 wt in my new kohler but the manual and stickers on the engine say use 10w-30. Also manual says do not use synthetic until after 50 hours. Got any suggestions?
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Old 06-05-2010, 10:13 PM
Briggs Man Briggs Man is offline
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Location: Toronto
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I don't know for sure which is the best oil but i try to use either 10w30 or sae30 i find the engine will always run good , i think the most important thing is not what brand or type as long as you just keep up with your oil changes and do them often especially when doing alot of work with them so there is always good lubrication
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Old 10-14-2010, 05:55 PM
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Road Ruler Road Ruler is offline
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Location: Burlington Ontario Canada
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My JD F525 Kaw engine has a sticker on the side of the engine that states 10W/30 oil yet the JD maintenance pkg for the F525 contains straight 30 Oil. Hummmm!
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