Car engine oil in bikes?

[biggeeman]

Any ideas any one do it?
To cut a long story short bike has high oil consumption ( another story ).

10w50 for bikes is expensive a lot cheaper for cars and especially good for tops up as it being cheaper and i do a lot of topping up.

My mate runs a r1 on car oil with no probs i have a ktm vtwin i know the clutches can be a issue with car oil think its worth a go?
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lol your funny

[Clutchy]

You could really of searched this, it's been done so many times.

Basically yes it's fine as long as it doesn't have any friction modifiers which can make your clutch slip
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[biggeeman]

[Northern Monkey]

[smegballs]

I've been putting car oil in countless bikes without a problem. My approach to oil is cheap oil changed often. As said, avoid anything that boasts of improving fuel economy. I got usually go for whatever generic semisynth is cheapest in my local motor factor.

[andym]

Oh.... Oh... does this mean there'll be a spate of 'do you nod', 'how fast have you gone', 'how to get a knee down', 'which tyres should I buy' threads?

[Moo.]

Go for it, whats the worst that could happen? This subject has been done to death and to be honest it all comes down to rider preference. I've been using car oil for ages and it works great! Only recently have i had a go at bike specific oil to try and cure an annoying gear problem with the bike to see if it would smooth it out.

It will protect the engine just the same and as stated, because its cheaper you can change it more often! Always a great way to prolong that engine

Atleast with the oil consumption and you having to put more oil in, you'll know its getting more fresh oil haha!
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A2 Passed 18/6/10

[1cyl]

I have in the past used car oil without problems.

But as I now own fairly expensive more modern engines, which I push fairly hard daily. I feel inclined to use the right syrup for the job just for peace of mind.

usually look for the JASO.
Here's a brief smattering of info:
https://www.oilspecifications.org/jaso.php
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[Moo.]

Go for it, whats the worst that could happen? This subject has been done to death and to be honest it all comes down to rider preference. I've been using car oil for ages and it works great! Only recently have i had a go at bike specific oil to try and cure an annoying gear problem with the bike to see if it would smooth it out.

It will protect the engine just the same and as stated, because its cheaper you can change it more often! Always a great way to prolong that engine

Atleast with the oil consumption and you having to put more oil in, you'll know its getting more fresh oil haha!
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A2 Passed 18/6/10

[arry]

I have a data sheet somewhere with the additive pack data, tbn and tan of a lot of synthetic car oils. I'd love to get a bike oil analysed and see what the differences really are

[Robby]

10W50 is a fairly unusual grade, so a 10W50 car oil is likely to be a high end one and will have a high probability of causing clutch slip.

Those of us that use car oil tend to buy cheap 10W40.

Why do you need 10W50?

[biggeeman]

[-Matt-]

As a side note to whats been said already. My bike needs the wet clutch friendly oil (JASO-MA spec i think it is).

'Halfords motorcycle oil' as an example which ive used doesnt specify this on the minimally labeled tub. But i contacted comma who made/make? their oils and they confirmed all the oils they produce meet that requirement as standard, so may be more cheaper oils than it first appears that would be fine.

[gavbriggs]

So which are these oils?

A search for: jaso ma/ma2 rated car oil just brings up loads of 4t oils.

What brands/grades can be used?

[biggeeman]

[Kickstart]

Hi

Not had a problem with any I have used (including fully synthetic 5W40 car oil). Used a 10W40 BP oil for years, and then a 10W40 Rock Oil semi synthetic car oil.

A few people have had problems, and one that does crop up as causing issues is the Castrol Magnetec range (rather than normal GTX).

All the best

Keith
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[gavbriggs]

Might be worth a good scout around and a sticky on car oils suitable for bikes? If someone can be arsed it will save a lot of cash

[arry]

Just had a look at the data sheet off my phone so difficult to read but oils with high molybdenum content are in order of content levels:
Castrol RS 10w 60
Valvoline max life 10w 40
Castrol Magnatec
Mobil 1 motorsport 15w 50
Motul 20w 50

Other friction modifiers are available and may be present. And bear in mind the data here is just a limited number of oils tested.

Halfords motorsport 5w 50 has no molybdenum content when tested, nor does Carlube Triple R. Shell Helix and Valvoline Synpower appear to have very low levels.

[Shinigami]

topic has been done to death, I currently use cheap halfords 10w40 which I stocked up on when they flogged it off dirt cheap, no problems at all
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[DrSnoosnoo]

just my worth.

I used ASDA 10w40 in the ZZR at the last change. This year I might go for some morrisons - it's closer.
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[MarkJ]

[biggeeman]

Just done a oil change with asda brand 10w40 semi synth
Just gonna nip out n test heres hoping.
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lol your funny

[MarkJ]

It's fine, I've used that in the past too.

[biggeeman]

Hahaha job done runs sweet as a nut £16 and ive got 1.5 litres left for top ups.
No probs with clutch either, still clutch wheelies as it did before

Thats Asda price ching ching

https://m.direct.asda.com/ASDA-10W40-Semi-Synthetic-Oil---5L/001021119,default,pd.html

Cheers for the help.
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lol your funny

[weasley]