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[mick-1975]

Yes 15/40 is thicker than 10/40. Did you check the crankcase breather tube was clear?

Paul

Good thing to check that, its because of that little b*llocks that one of my conrods ended up over there somewhere

   
ouch  

[Omega man 2]

Yes 15/40 is thicker than 10/40. Did you check the crankcase breather tube was clear?

Paul

Good thing to check that, its because of that little b*llocks that one of my conrods ended up over there somewhere

   
ouch  

All sorted now however
With my omega, if it breaks, it shall be fixed no matter what

[mick-1975]

Yes 15/40 is thicker than 10/40. Did you check the crankcase breather tube was clear?

Paul

Good thing to check that, its because of that little b*llocks that one of my conrods ended up over there somewhere

   
ouch  

All sorted now however
With my omega, if it breaks, it shall be fixed no matter what

  same as mine , nothing better than getting spanners out on a good day .  

[Abiton]

10/40 vaux semi syn  

  daft question but how does the grade work with the thickness ??

[/highlight]

I think its something like 10 is the thickness it is and the 40 is temp it is ok to as -40 i think. Someone else will be along soon to give accurate  info

Paul

P.s I need to typr quicker

I always thought the numbers related to the viscocity of the oil at operating and room temp. So 10/40 would be thinner than 15/40 at operating temp but the same when cold.  I could be mistaken though

Other way round I think, same viscosity at op. temp, 10 is runnier when cold (than 15).

The 10 indicates that it flows like a '10-weight' oil at cold temps, the 40 indicates that at operating temperature it behaves like a much thicker/heavier oil (although it isn't actually thicker than when cold, just not as thin as it would be if it behaved only like a 10-weight oil).  It's the additives that allow it to have this 'multigrade' dual-personality.  Confusing, huh?  

[mick-1975]

10/40 vaux semi syn  

  daft question but how does the grade work with the thickness ??

[/highlight]

I think its something like 10 is the thickness it is and the 40 is temp it is ok to as -40 i think. Someone else will be along soon to give accurate  info

Paul

P.s I need to typr quicker

I always thought the numbers related to the viscocity of the oil at operating and room temp. So 10/40 would be thinner than 15/40 at operating temp but the same when cold.  I could be mistaken though

Other way round I think, same viscosity at op. temp, 10 is runnier when cold (than 15).

The 10 indicates that it flows like a '10-weight' oil at cold temps, the 40 indicates that at operating temperature it behaves like a much thicker/heavier oil (although it isn't actually thicker than when cold, just not as thin as it would be if it behaved only like a 10-weight oil).  It's the additives that allow it to have this 'multigrade' dual-personality.  Confusing, huh?  

   confusing is,nt the word.