Most current quality motor oils are as low ash as IH Low Ash was back in the 1960s. Auto manufaturers have seen the benefit of low ash oil too. The current IH Low Ash is still one of the leaders in low ash oil but all "synthetic oils" have lower levels and some conventionals like Castrol GTX also have a lower level of sulfated ash too.
What makes no sense is that until the last couple years sulphated ash was present at an elevated level in diesel engine oil and people were constantly posting how it was better than typical gas engine oils. The "new" government requirement of ULSD has resulted in all (?) diesel engine oils also being low in sulfated ash. So now recommending diesel oil for a gas engine is "OK" but a few years ago it was the exact opposite of what IH and others told owners.
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Today's Featured Article - Talk of the Town: Repairin a Gas Tank - by Staff. This interesting discussion is from the Tool Talk Discussion Forum. Remember that safety is your first priority - make sure you know what you are doing before attempting a potentially dangerous activity!
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