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Best oil for Vintage Cushman Scooter #4628819
01/08/18 11:24 PM
01/08/18 11:24 PM
Joined: Jan 2018
Posts: 1
Ripon,Ca USA
Rush949 Offline OP
Rush949  Offline OP
Joined: Jan 2018
Posts: 1
Ripon,Ca USA
What would be a good mineral based oil for a Cushman scooter? Some run Rotella 30wt , others 30 wt oil with Lucas ZDDP additive and Dennis Carpenter sells Lucas Hot Rod oil 10-30 and 10-40. This is a flat tappet engine. TIA

Re: Best oil for Vintage Cushman Scooter [Re: Rush949] #4628823
01/08/18 11:32 PM
01/08/18 11:32 PM
Joined: Dec 2016
Posts: 7,199
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,199
Waco, TX
The valvespring pressures in the ol' Cushman are ABYSMALLY low.

An 30W will do fine.

Briggs and Stratton engines with equivalent valvespring pressures run a PLASTIC camshaft!

So, just about any oil is fine. Really.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Best oil for Vintage Cushman Scooter [Re: Rush949] #4628824
01/08/18 11:35 PM
01/08/18 11:35 PM
Joined: Dec 2016
Posts: 7,199
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,199
Waco, TX
Oh, I forget.... I run any inexpensive 15W-40 HDEO (diesel) in all my small engines.
I don't have any new "CK" oil, I think the newest 15W-40 I have is CJ.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Best oil for Vintage Cushman Scooter [Re: Rush949] #4628825
01/08/18 11:37 PM
01/08/18 11:37 PM
Joined: Dec 2016
Posts: 7,199
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,199
Waco, TX
The one I had looked identical to this, but different upholstery color:

I still have the horn!!

.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Best oil for Vintage Cushman Scooter [Re: Rush949] #4628939
01/09/18 07:08 AM
01/09/18 07:08 AM
Joined: May 2006
Posts: 594
Palmyra, PA
kmrcstintn Offline
kmrcstintn  Offline
Joined: May 2006
Posts: 594
Palmyra, PA
I have read a Spectro product catalog in the past (past 2 years) and several oils in their lineup have up to 1800ppm zddp; might want to call them to find out which ones have the extra zddp; if ya wanna go the way of hdeo with cj-4 ratings then consider Traveller brand 15w-40 at Tractor Supply Company; current special is 2.5 gallon container for $21.99; I think Supertech 15w-40 at Walmart is still cj-4; if ya want a true name brand in hdeo...Shell Rotella T-4 is ck-4 WITHOUT sn rating which means higher zddp potential or Motorcraft which states higher than 1000ppm zddp on the bottle;

on a sidebar...I'm doing the annual research on choosing oil for my 2-wheeled death machines; I go round & round...synthetic vs synblend vs conventional, hdeo vs motorcycle oil vs 10w-40 pcmo; I have NO idea where to land...I have 5 qts of 10w-40 & 15w-40 frankenbrew, 2 qts of Kolpin 10w-40 synblend powersports oil, and 3 qts of Kawasaki 10w-40 synblend mower oil with wet clutch capability (thought it was bike oil and didn't read the bottle...can't find the receipt); most likely I will tap the frankenbrew for the first oil change after running the storage oil for a month and go from there...


'15 Jeep Patriot Sport (2.4L 4-cyl), '13 Genuine Buddy 125 (125cc air-cooled thumper), '14 Yamaha V Star 250 (250cc air cooled v-twin)
Re: Best oil for Vintage Cushman Scooter [Re: Rush949] #4628968
01/09/18 07:56 AM
01/09/18 07:56 AM
Joined: Dec 2003
Posts: 9,929
Florida, Cape Coral
Eddie Offline
Eddie  Offline
Joined: Dec 2003
Posts: 9,929
Florida, Cape Coral
I had one just like the picture and ran 30 wt viscosity oil. I can't remember the brand of oil though. Ed


CX5 Touring 2.5L :-)
Re: Best oil for Vintage Cushman Scooter [Re: Rush949] #4628973
01/09/18 08:12 AM
01/09/18 08:12 AM
Joined: Sep 2015
Posts: 6,086
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 6,086
Kalifornia Kollective
No need for the extra ZDDP. Anything over 800 PPM will be fine. If it were my scooter, I'd run any HDEO in 15W-40 flavor. But if you have a Tractor Supply nearby, some Traveller 15W-40 would do very nicely smile

http://www.pqiadata.org/Travellers15W40.html?utm_source=July+23%2C+2015&utm_campaign=7%2F24%2F2015&utm_medium=email smile


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: Best oil for Vintage Cushman Scooter [Re: Rush949] #4629253
01/09/18 12:45 PM
01/09/18 12:45 PM
Joined: Jan 2005
Posts: 5,689
Charlotte, NC
Oldmoparguy1 Offline
Oldmoparguy1  Offline
Joined: Jan 2005
Posts: 5,689
Charlotte, NC
I had one of those as a teenager. Direct drive, no transmission. Sold by Sears. Top speed ~35mph. There were 3 engines, 3, 4, and 5hp. Same block with a different bore. Tough motors. Had replaceable bearings on the crank shaft and rod, pressure lubrication. I had the 4hp model. Had the engine bored and installed a 5hp piston. Cleaned up the ports, cut a thin head gasket to raise the CR. Installed a larger carb off of a Wisconsin stationary motor. Made a straight pipe on the exhaust. It would do an honest 75mph! Really enjoyed that thing. grin2 Ran 40 weight oil in it in the summer. Couldn't ride it in the winter in northern MI.

Any 15W-40 would be ideal. thumbsup


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If Noah had used Zip, he could have used a smaller boat.

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