I get it that ideally you would want to run a tank of gas containing Techron / Gumout right before you change your oil - but what if that is not possible and you need to change the oil with 3/4th to 1/2 a tank of gas containing the fuel system cleaner in it ? In a well maintained engine , is there any problem with changing the oil while you still have a tank of gas left containing a bottle of Techron / Gumout in it ? In my case I used Gumout Complete fuel system cleaner .
Techron / Gumout : Use Only Just Before Oil Change ?
- Thread starter ChrisD46
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No issues at all.
The Gumout bottles recommend every 3,000 miles and not more that twice per OCI. So I use a bottle when my OLM is at like 55% and again when I'm a tank or two before an oil change. I think it's the over-cautious BITOGer who only uses it just before an oil change.
And where did this notion originate?
Is it pure myth or from a reasonable body of evidence?
seriously
The “use a fuel system cleaner in the last tank of gas before your next oil change” is found every where here and elsewhere . The logic is that any deposits removed by the fuel system cleaner will land in the oil which will be changed soon when the gas tank + fuel system cleaner reaches down to 1/4 gas tank… *My question is in a well maintained engine , often using top tier gas the likelyhood of fouling up oil with a high amount deposits SHOULD be limited ?
I prefer running it just before oil change but that doesn't mean I stick to this religiously. Why potentially contaminate fresh oil right in the beginning of an OCI?
I’ll use it 400 to 500 miles before my oil change a couple times per year.
Back in the days when Terry Dyson was on this forum, he recommended an oil change following my use of BG-44K.
Note: Dyson Analysis was a fixture in the oil analysis business for years
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