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Post by colinjay on May 15, 2008 2:16:27 GMT -5
The SR I rode at Tanunda runs on woolies Homebrand oil (like most of my bikes) and has since it I rebuilt the engine in 1999. There have been a few occasions where I have used Valvoline XLD (what I run in my Rodeo ute) in it becauce I have been too slack to go and buy some oil and just use some of the oil that I have for the ute. THe bottle says that it has an API/SAE rating and thats good enough foe me. I am one of those that go on the fact that woolies don't make their own oil, they just have their label put on someone elses oil, for all I know it could be Valvoline or Castrol oil that I am using!
I use the same woolies Homebrand oil in the XT that I am riding in the SA Reliability Trials series, and am just changing the oil and filter after each event.
CJ
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Post by solo2racr on May 15, 2008 10:45:09 GMT -5
Secondly, while I have been on holidays over the past two weeks I have had the gearbox apart on three old engines (2 x XT's and 1 x SR), all of these engines are showing significant wear (loss of the case hardening) on third gear. Not knowing any history on these engines it is hard to put a cause to the wear, however I would not be suprised if the problem is due to the use of std engine oils that do not have a good enough viscocity/hi-pressure/extreme-pressure rating to protect the gears over the long and hard life that they have endured. I have seen this type of wear in other engines and believe it is common to most unit construction motorcycle engines that run engine oil in the transmission, and is not just isolated to our 500 engines. So it is one more thing to consider when desiding what oil to use. This has always been a compromise in engines that share engine oil with the gearbox (unit engines). What works well for one, doesn't for the other ( engine VS. gearbox lubrication ). This is one area in which I think motorcycle specific oils would be the better choice. One would have to think that they would design an oil for motorcycles with that in mind. Where as, an oil designed for auto/diesel use wouldn't have to take this into account. I would have to guess that the manufacturers see trans. gear wear rates as acceptable. With that said, it wouldn't be difficult for them to isolate the trans from the engine and be able to use TWO different oils in each. |
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Post by colinjay on May 15, 2008 17:33:23 GMT -5
I had a look at the API ratings on the bottles of oil I have on my shelf in the shed last night. The 20w-50 HOMEBRAND (woolies) oil is API SG/CD, the 20w-50 PENRITE (small petrol engine, suitable for air cooled motorcycles) is API SG/CC. So they have the same rating / meet the same standards, yet the price the price difference is hugh.
CJ
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Post by wotavidone on May 15, 2008 19:39:42 GMT -5
I'm convinced - I shall continue to run the valvoline XLD. If I was to run a super hotted up 8000 rpm screamer, maybe I'd go for the flash stuff, but my stock engines seem to do fine. And If CJ has got nine years of commuting with Woolies Oil, can''t be too much of a problem.
mick
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pcnsd
Full Member
Posts: 113
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Post by pcnsd on May 15, 2008 22:11:24 GMT -5
Gentlemen -
The issue is not ball bearing lubrication, but the slip-face between your cam and rockers. Me thinks a different animal. Still, any fresh oil is better than none and my application was race after all. If you receive good service from your choice, more horsepower to you.
PC
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Post by milkman on May 16, 2008 4:58:44 GMT -5
I'm not up to date with what does and doesn't have friction modifiers
If i'm using a 20-50W car oil like GTX does it have modifiers in it now? Its designated for older cars (leaded engine models included), only $4 a litre and has doen the job when i had nothing else on hand
Are oils made for modern unleaded engines not as good for teh SR? Are they substantial due the the hardened casing on unleaded motors?
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Post by davedunsboro on May 16, 2008 7:20:14 GMT -5
I've used Castrol Delo 500 , Shell Helix 10/40 & Rimula X . Its my Landcruiser's prefered brands & its also tax deductable & my SR's love it too! The extra bonus is , after its been in the SR it gets to go into the lawnmower to be burnt to oblivion as it loves it too ! (yes the guy in the lawnmower shop shakes his head too) But that only cost me $100 & its been going for 8 years ! Now my Laverda gets the good oil, it gets Motul or Activ 4 . That bike cost the same as all my SRs together & It gets the longer rides too , cheers Dave.
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Post by solo2racr on May 16, 2008 10:20:03 GMT -5
I'm not up to date with what does and doesn't have friction modifiers If i'm using a 20-50W car oil like GTX does it have modifiers in it now? I was at the oil store yesterday checking out what they had. I did find one oil that said it had friction modifiers in it that did not have the "EC" rating. Generally, friction modifiers are in the lighter viscosity oils. 10w30 and down. You should be able to find the "EC" rating on the back of the bottle. It would be on the circle that shows the grade of the oil. Castrol GTX 20w50 should be fine. I posted a link to a page that explains alot of what to look for and what to avoid, on the previous page. Second post from the top. |
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Post by caferacercarl on May 17, 2008 4:29:17 GMT -5
I use 10w40 Bel Ray semi synthetic bike oil in the SR's [ 0w40 full synth in others,] and different oil in other engines, yamaha say's 10w40 for these and they built it. good point on the scrubbed cams etc, the husaberg guy's swear by dellow diesel oil here,no problems. I think it goes on engine type a lot, as I have 5 different oils for motors in the shop. [and give customers no choice when I fill up their bike] carl.
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