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Dyna-S ignition system (now cam end float thread)

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royhall:
Just been recommended to change my engine oil on the Suzuki GS1000 from standard 10W-40 (diesel) to HDEO 15W-40. I'm told it stops the cam shaft end float issue. Anybody know what this oil is and where to get it, and is it okay with the clutch and gearbox. Cheers.

K2-K6:
I think it's a term (heavy duty engine oil) HDEO  used collectively for petrol derived light diesel engines, in other words car and light commercial diesels.

Bigger commercial stuff had specific oils that didn't match usage in much smaller engines as they came more into general car use. So petrol type oils where effectively modified to cope with extra loading. Making HDEO categorised oils. So looks like you are already there in my view.

Curiously,  after reading your thrust mod post the other day,  I was thinking if there could be any benefits to using a very specific oil type to help out.

Do you know what properties the person recommending to you is after?  Or is it just a general feeling of more protection?

royhall:
Just general advice from the old guy that does my bike MOT's. He's been in the trade 50+ years and reckons changing to the 15W-40 calms down the Suzuki cam issue. He was talking about "heavy duty truck oil" whatever that means. I can understand the switch to a slightly heavier grade oil making things less noisy and it's within Suzuki's recommended grades ie 10W-40 to 20W-50. But never heard the term HDEO before, and cant seem to find any for sale. Maybe I should ask him where he gets it from. Got to be worth a try if I can find some.

kevski:
To be honest it would depend on how much lateral movement you already have, a heavier oil may just mask the problem and increased wear, if i had a one of the Suzukis i would do the modification, on my big zed the thrust surfaces are in the insides of the caps unlike the Suzuki which has them on the outside, i have to put up with mine, you however are a little more fortunate and can do more about it if need be.
A lot of truck oils now are model specific, some of these tips from the older fitters are not always best, sawdust in the gearboxes was always a favourite of the old boys.

K2-K6:
This one has very specific blend for highly loaded camshaft applications VW 505.01

https://www.ebay.co.uk/itm/5W40-FULLY-SYNTHETIC-DIESEL-PD-ENGINE-MOTOR-OIL-5-LITRE-VW-AUDI-SEAT-505-01-/262014414928

Original spec for these motors stops at the lower end of 10w as mineral oils weren't generally available to get lower than that. This should exceed anything made then in most areas.

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