An interesting read . I’ve just rebuilt my MPI engine but what should I use in that?
Triple Qx Oil Spec?
Started by
TheFabMini
, Apr 25 2019 06:10 PM
19 replies to this topic
#17
Wiggy
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One Carb Or Two?
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Posted 26 April 2019 - 07:08 PM
Many people have many opinions.
Use whatever you feel is appropriate (within reason), but change it regularly. Every 3k would be good.
Personally, I don't think mineral vs semi synthetic, or exact viscosity is all that important. But that's just my opinion.
Use whatever you feel is appropriate (within reason), but change it regularly. Every 3k would be good.
Personally, I don't think mineral vs semi synthetic, or exact viscosity is all that important. But that's just my opinion.
#18
Chris M
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Mini Mad
- Location: Norwich
Posted 26 April 2019 - 07:26 PM
I agree wiggy. I put 10/40 in it last year & seemed to leak Luke a sive since. I’m contemplating 20/50 Halfords classic.
#19
TheFabMini
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Speeding Along Now
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Posted 26 April 2019 - 07:43 PM
I know the oil thing is covered on every forum a million times over with classic and modern cars.
I understand tuned and racing engines do probably require a more specialist product.
But (and this is just my thoughts with 0 knowledge)
When you take your modern car or back in the day our classics to your local service garage... they most definitely don’t bother buying a specific brand/api/sae etc etc oil... they now buy a big barrel of 5w30 and chuck it in everything
And I assume back in the 60s-90s just had a big barrel of 20w50 mineral oil and a few bottles of stp kicking about...
I might be wrong, but that’s just my logic.
I understand tuned and racing engines do probably require a more specialist product.
But (and this is just my thoughts with 0 knowledge)
When you take your modern car or back in the day our classics to your local service garage... they most definitely don’t bother buying a specific brand/api/sae etc etc oil... they now buy a big barrel of 5w30 and chuck it in everything
And I assume back in the 60s-90s just had a big barrel of 20w50 mineral oil and a few bottles of stp kicking about...
I might be wrong, but that’s just my logic.
#20
oilman
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Mini Mad
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Posted 29 April 2019 - 11:43 AM
The thing that makes the mini oil requirements interesting is the shared engine and gearbox. The result of this is the oil will be prone to shearing down (thinning) much easier than if the oil was just looking after an engine.
So your average 20w-50 mineral classic oil will be fine and should have a good slug of zddp but it will shear down quite quickly so regular changes are a must. Now some manufacturers make a mini specific oil with additional ep additives that mean the engine oil will also pass the API GL4 ep gear oil rating, so this will make the oil more shear stable and helps with the load on the gear teeth, Millers do one. The Valvoline VR1 is also very good, mineral and no GL4 properties but is very shear stable, hence a popular choice.
The other option as mentioned earlier is to use a 20w-50 or 15w-50 bike oil intended for wet clutch applications, these bikes share both engine oil and gearbox oil so have been developed with shear stability in mind.
Cheers,
Guy
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