Originally Posted By: OVERKILL
Originally Posted By: Clevy
Originally Posted By: TrevorS
Will these high rates of consumption lead to more emission system warranty claims?
Low tension rings are the entire reason for the SN and lowered zddp in engine oils.
Let's consider that high tension rings don't start burning oil til 200k miles for example. By that point the emissions system is likely nearly shot anyways. So oil burning with high phos isn't as big a deal since the warranty period is long past so the oem isn't on the hook for replacement,so a high zddp oil is fine.
Low tension rings may not seat properly so the engine is an oil burner right off the bat,so in order to free themselves of having to replace the emissions equipment during the warranty period the oem inform the API that phos needs to be reduced so the emissions system lasts beyond the warranty period so zddp is lowered to compensate.
Now even though oil consumption is more common now I can say without a doubt I've not owned an engine that consumed any measurable amount of oil however I put my foot into the throttle pretty often which will improve ring seal.
I use mos2 and ceratec as well but I cannot say if either of these products help in that regard.
I broke in my 106ci engine on my Harley very hard on the highway. I rode 50 miles running in third going full throttle then completely off and let the engine brake. I then changed the oil,and cut open the filter and there were no metallic bits in the oil nor the filter.
And that bike runs very hot yet doesn't consume any oil whatsoever.
Break in is more important now than it ever has been in my opinion.
But OEM's have been using low tension rings since the 80's.
Right. And it took some time for them to implement a way out.
SL still had highish zddp,SM Saw it reduced then SN saw another reduction.
Include the various emission law changes and we are where we are today.
I'm stating my observations over the years
Originally Posted By: Clevy
Originally Posted By: TrevorS
Will these high rates of consumption lead to more emission system warranty claims?
Low tension rings are the entire reason for the SN and lowered zddp in engine oils.
Let's consider that high tension rings don't start burning oil til 200k miles for example. By that point the emissions system is likely nearly shot anyways. So oil burning with high phos isn't as big a deal since the warranty period is long past so the oem isn't on the hook for replacement,so a high zddp oil is fine.
Low tension rings may not seat properly so the engine is an oil burner right off the bat,so in order to free themselves of having to replace the emissions equipment during the warranty period the oem inform the API that phos needs to be reduced so the emissions system lasts beyond the warranty period so zddp is lowered to compensate.
Now even though oil consumption is more common now I can say without a doubt I've not owned an engine that consumed any measurable amount of oil however I put my foot into the throttle pretty often which will improve ring seal.
I use mos2 and ceratec as well but I cannot say if either of these products help in that regard.
I broke in my 106ci engine on my Harley very hard on the highway. I rode 50 miles running in third going full throttle then completely off and let the engine brake. I then changed the oil,and cut open the filter and there were no metallic bits in the oil nor the filter.
And that bike runs very hot yet doesn't consume any oil whatsoever.
Break in is more important now than it ever has been in my opinion.
But OEM's have been using low tension rings since the 80's.
Right. And it took some time for them to implement a way out.
SL still had highish zddp,SM Saw it reduced then SN saw another reduction.
Include the various emission law changes and we are where we are today.
I'm stating my observations over the years
