aronbike Posted March 13, 2020 Report Share Posted March 13, 2020 Hi!can you help me to find the equivalent oil and lubricants to be used for a Dnepr 650cc with engine MT10-36 and gearbox MT804?I attached pictures taken from MT16 manual. Premise I will use the bike in a temperature range from 10 °C winter till 40 °C summer, I made list below reading on-line. What is your opinion?- Front fork oil: SAE 10- Motor oil: SAE50 or 20W50 from Harley Davidson- Gearbox oil: EP 80W90 GL4- Rear drive and reductor at sidecar wheel: Castrol Syntrax Limited Slip 75W-140 Fully Synthetic Car Gearbox Oil Thanks Quote Link to comment Share on other sites More sharing options...
3 bike mike Posted March 13, 2020 Report Share Posted March 13, 2020 Motor oil: 20W50 - Gearbox oil: EP 80W90 GL4thats what i use, cant remember the final drive !!Forks I use ATF fluid Quote Link to comment Share on other sites More sharing options...
racepres Posted March 14, 2020 Report Share Posted March 14, 2020 Motor oil: 20W50 - Gearbox oil: EP 80W90 GL4thats what i use, cant remember the final drive !!Forks I use ATF fluid This is Fine... Remember the Dnepr uses "plain Bearings" in the bottom end... hence lighter and multi-vis.. Harleys and Urals use roller bearings... hence the capability of heavier single-vis lubricant.. Quote Link to comment Share on other sites More sharing options...
aronbike Posted March 16, 2020 Author Report Share Posted March 16, 2020 Oil M-8B should be a SAE 20, so 20w-50 looks like reasonalble. I believe for a old style Dnepr engine a mineral oil is better. I understood syntetic with high temperture have tendency to cause more leakeage. Is it true? For gearbox: oil ТАП-15В (SAE 90 API GL-3) is equivalent to:- Gear Oil (BP)- Mobilube GX90 (Mobil)- Spirax 90 EP (Shell)- Gear oil GP 90 (Esso) Is there any issue if I use a GL4 or GL5 when GL3 is recommended? Quote Link to comment Share on other sites More sharing options...
racepres Posted March 19, 2020 Report Share Posted March 19, 2020 Oil M-8B should be a SAE 20, so 20w-50 looks like reasonalble. I believe for a old style Dnepr engine a mineral oil is better. I understood syntetic with high temperture have tendency to cause more leakeage. Is it true? For gearbox: oil ТАП-15В (SAE 90 API GL-3) is equivalent to:- Gear Oil (BP)- Mobilube GX90 (Mobil)- Spirax 90 EP (Shell)- Gear oil GP 90 (Esso) Is there any issue if I use a GL4 or GL5 when GL3 is recommended? I use 10W30 or 40 Dino engine oil in my Dnepr, and any Non GL Gear oils... seems someone somewhere said something about bronze bushings and GL rated Oils... so... I take No Chances!!! Quote Link to comment Share on other sites More sharing options...
RussN Posted March 20, 2020 Report Share Posted March 20, 2020 With these old Russian machines, you could probably use whale oil and bear grease and they would be just fine.And that's based on what some of the bikes coming new from the factories had in them!RussN Quote Link to comment Share on other sites More sharing options...
racepres Posted March 21, 2020 Report Share Posted March 21, 2020 With these old Russian machines, you could probably use whale oil and bear grease and they would be just fine.And that's based on what some of the bikes coming new from the factories had in them!RussNAbsolutely agree... Old Tech, is Very Forgiving!!! Quote Link to comment Share on other sites More sharing options...
bervas Posted March 27, 2020 Report Share Posted March 27, 2020 The MT10 user manual says soviet AS8 (AC8 in cyrillic) oil is required both for engine and gearbox.I find a scientific paper telling AS8 has a SAE20 grade. In other documents I have find SAE 20 for winter and SAE 30 for summer in case of the engine. These are monograde oils of mineral base. It seems MTD (Tecumseh?) lawnmover engine oils have similar specifications. Some use monograde SAE 50 tractor oil. 80W90 hypoid oil (with EP additives) is required for the conical drive. Quote Link to comment Share on other sites More sharing options...
Vance Blosser Posted March 28, 2020 Report Share Posted March 28, 2020 Someone once told me that during the Soviet era there were basically three lubricants available to the civilians - motor oil (single weight, no detergents), gear oil, and grease. I don't know if it's true or not but it sounds plausible. Quote Link to comment Share on other sites More sharing options...
haj Posted March 30, 2020 Report Share Posted March 30, 2020 Well, most old stuff works quite all right with SAE30 or SAE50.. Personally I stay away from synthetics on my older engines. And run a classic 20W50 on my K750, and a classic gear oil in the gearbox and final drive..I replace the engine oil at around 2500km, or at least ones every year. If it had an oil filter I guess I'd replace it every 5000km.It seems to work all right. On my other older MC (A DKW 2-stroke) I'm using a classic SAE30 on the gearbox. Quote Link to comment Share on other sites More sharing options...
Scott E Posted June 10, 2020 Report Share Posted June 10, 2020 Here in the USA Zinc (ZDDP) is no longer in off-the-shelf motor oils as it was in the past. Zinc in oil is needed for flat tappet lifters and the cam lobes to prevent rubbing wear. The zinc coats the surfaces to prevent metal to metal contact. The main reason for removing zinc from oil was the zinc clogging up the catalytic converter in the exhaust system. STP makes an oil additive with ZDDP for older engines with flat tappet lifters and cam shafts. You can go on-line and order motor oil with zinc in it for now vintage vehicles but it's cost is excessive in my opinion when the STP product accomplishes the same thing by just adding it to your favourite oil. Quote Link to comment Share on other sites More sharing options...
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