does the robin subaru 35cc come w/ oil in it

[Mountainman]

not what the book says ??

be sure to use synthetics

not what the Robin book says
over many many years
never wore one out with standard oil ??

MM

 

[Old Bob]

13,000 rpm? Those engines turn that?View attachment 19460

My modified engines turn that without trouble.Factory stock won't.

I make my oil choices by cam lobe wear which is the component with the highest load, using Castrol GTX 10w-30 or Havoline 10w-30 regular oil, I can put a high lift cam in and not see any wear at all after 4 hours. However this is after the cam followers are allowed a break in/wear in period that allows them to achieve a polished finish on the contact surfaces.
Synthetic is known to interfere with break in on some engines.
My test engines were torn down after each test,I've had many others apart with high hours, none of which ran synth. Wear with regular oil is not a problem.

Neither Honda nor Robin endorse synthethics, its a user option but I see no need for it.Good quality clean oil is all you need.

My opinions come from actual experience with these engines pushing them well beyond design limits for the last 7 years, not from things I read on the web that apply to multi cylinder automotive engines.

 

[Happy Valley]

OB
To what extent are those engines modified and would any of that be an a performance enhancement in the application on motorized bikes?

 

[give me vtec]

My modified engines turn that without trouble.Factory stock won't.

I make my oil choices by cam lobe wear which is the component with the highest load, using Castrol GTX 10w-30 or Havoline 10w-30 regular oil, I can put a high lift cam in and not see any wear at all after 4 hours. However this is after the cam followers are allowed a break in/wear in period that allows them to achieve a polished finish on the contact surfaces.
Synthetic is known to interfere with break in on some engines.
My test engines were torn down after each test,I've had many others apart with high hours, none of which ran synth. Wear with regular oil is not a problem.

Neither Honda nor Robin endorse synthethics, its a user option but I see no need for it.Good quality clean oil is all you need.

My opinions come from actual experience with these engines pushing them well beyond design limits for the last 7 years, not from things I read on the web that apply to multi cylinder automotive engines.

any down side to using synthetics?

 

[Happy Valley]

I've mentioned this before, with mixed reviews, but here it is anyway.
From Crommelins Machinery, an equpment dealer in AU for for over 50 years. From their website tech support page:

Q: WHAT IS THE BEST OIL FOR 4-STROKE SUBARU ENGINES?
A: The best engine oil for your petrol-powered, 4-stroke SUBARU engine is a high-quality, mono-grade 30W oil and NOT a multi-grade. The rings on new engines will not bed properly if a multi-grade oil is used - you will just end up with a beautifully glazed bore!

Q: WHICH OIL SHOULD I USE FOR THE SUBARU EH025 & EHO35 SERIES ENGINES?
A: These engines are used on brushcutters, blowers, blower vacs and portable vibrator shafts. The owners manual suggests 10w-30 oil. Unfortunately weather temperatures above 20 degrees (68 degrees F) can cause excess oil in the air filter of these engines. We suggest that 30 grade mono be used consistently

http://www.crommelins.com.au/faqs.cfm#13Cat

 

[bamabikeguy]

Okay, the purpose of MB.com is to pursue the correct answer, for the benefit of all.

I got my advise from 2 motorcycle dealers originally, concerned about the watery greenish/yellowish color of the oil on the first oil change I made on the first RS install, way back in 2007. I didn't consult GEBE or Robin, thought what works for Harley and Yamaha would work for my engines.

I just got off the phone with Denis at GEBE, (about another aspect/improvement for the R/S 35), and at the end of the 30 minute conversation, I asked for the straight scoop on the synthetic oil question.

Motorcycles are different in two major ways, more cooling fins and some are water cooled.

My apologies for the mis-interpretations.

He said Robin/Subaru recommends REGULAR 10W-30, (Valvoline for example), because of the many variations the engines can encounter in temperature. That the REGULAR stays on the internal parts better at the highest temperature.

Therefore, I will no longer recommend the synthetic, but will make the switch to $4 Valvoline on my future builds.

 

[Old Bob]

OB
To what extent are those engines modified and would any of that be an a performance enhancement in the application on motorized bikes?

I neve tried one one a motored bike, this is why I am interested in these things.

 

[Pablo]

That the REGULAR stays on the internal parts better at the highest temperature.

I am sorry that is just wrong, bogus information. It's simply not true.

 

[bamabikeguy]

I am sorry that is just wrong, bogus information. It's simply not true.

Denis is stating what Robin Subaru informed him of, and he said he's spoken to it a few times. Because of warranties, he can't do any different, give info not in the RS program.

What I think the corporate reasoning is would be "international conditions", one size fits all.

If they were to recc. synthetic, but the clients be in Timbucktu, the 10w-30 specification makes it easier for them.

So, what I was doing was getting the official answer.

I know you guys are a lot more lubrication specialists (Amsoil is the BEST solution to long distance traveling/mixing on the run), and some disputes are never solved, but I just wanted to get my mea culpa on record.

 

[Mountainman]

haven't seen ????????????????

I am sorry that is just wrong, bogus information. It's simply not true.

haven't seen ??????????????
any truly large -- small engine repair shops using syntitetic oils
talking very large shops that order oil by the many 55 gallons
I still visit the old City shop where I worked for years
they have some ((master mechanics)) working there -- some 40+ yrs exper
still using what we call -- the old -- common oil

ridden a many a 2-wheel thing with it