2011 IS250 - Oil reducing carbon buildup

[chrisri]

I think that European ACEA C3 would work better in your DI Lexus. It's a mid-SAPS oil specification with lower TBN, but with reasonable long OCI, let's say up to 10k km it could work with high sulphur fuel you're using in Canada. 7 or 8k UOA would be necessary to see how well the oil is holding up. It's good for 20-30k over here so 10k in Canada shouldn't be a problem.
Also it's oil with higher HT-HS so it will handle fuel dilutions better than SN 5w30.

Cheers

 

[wemay]

That's a good point and one of the options i left off the list in error. Thank you for pointing it out chrisri.

 

[Thugzy]

Originally Posted By: chrisri
I think that European ACEA C3 would work better in your DI Lexus. It's a mid-SAPS oil specification with lower TBN, but with reasonable long OCI, let's say up to 10k km it could work with high sulphur fuel you're using in Canada. 7 or 8k UOA would be necessary to see how well the oil is holding up. It's good for 20-30k over here so 10k in Canada shouldn't be a problem.
Also it's oil with higher HT-HS so it will handle fuel dilutions better than SN 5w30.

Cheers


That is very interesting. Thanks for your input. If I went this route, which oil in Canada would you recommend?

 

[chrisri]

I would consider using M1 ESP 5w30. It meets C3/C2, MB 229.31, 229.51 and BMW LL04.

 

[chrisri]

Originally Posted By: chrisri
I would consider using M1 ESP 5w30. It meets C3/C2, MB 229.31, 229.51 and BMW LL04.


It seems this M1 have really low initial TBN of 5.4 so it's not the best choice. Oil from Liqui Moly, Top Tec 4100 have higher starting TBN and it seems that is able to ratain it very good ( there's some UOA from members on this forum). It's also a mid-SAPS while ESP is low-SAPS formula.

 

[Garak]

The M1 ESP might still be a reasonable choice. He could always check through a UOA, and could probably get that oil cheaper than Liqui Moly and the competition. PartSource may even have it on the shelf, and Imperial Oil certainly does. Our gas is much like that in the States, but if one isn't pushing an OCI, there's not a big concern.

 

[chrisri]

Garak I agree with you. If Top Tec is more expensive or harder to obtain ESP could still be reasonable choice, but with higher TBN of 7.4 (top Tec) OP could be more relaxed.
Min TBN for A3/B4 in 2010 was 8, so it's not massive difference.

 

[Olas]

Any oil will work fine and have no effect on carbon.
The egr and PCV are solely responsible, anything else you try is a band aid on a symptom without addressing the cause. A recipie for failure.

 

[il_signore97]

Originally Posted By: Olas
Any oil will work fine and have no effect on carbon.
The egr and PCV are solely responsible, anything else you try is a band aid on a symptom without addressing the cause. A recipie for failure.


There have been studies done by Lubrizol that were discussed in the European forums that seemed to indicate that they found reduced valve deposits when using a low-SAPS oil as opposed to a higher-SAPS oil, so the oil does have an effect.

If you think about their results, it makes sense. Yes, you're correct in that the problem comes from the PCV and EGR systems, but through those systems flows oil vapours and soot. Therefore, it would stand to reason if an oil could improve upon the cleanliness of those flows, then the valve deposits would be reduced. Let's also assume that one does not want to mess with their vehicle under warranty - one can easily try a low-SAPS oil that meets relevant requirements (in the OP's case it would be simply an API SN oil).

 

[Greasymechtech]

Every thread turns into a useless debate.

Great looking car. TGMO and 91 toptier will serve you fine.

Don't forget the other fluids.

 

[Garak]

Originally Posted By: chrisri
Garak I agree with you. If Top Tec is more expensive or harder to obtain ESP could still be reasonable choice, but with higher TBN of 7.4 (top Tec) OP could be more relaxed.

Certainly. It would be nice if we had Euro type gasoline here, but such is life.