Re: 100:1 Mix
uuuh - (sound of sad-old-man-with-ponytail trying to remember the lessons of a distant youth)
.....yeah... we used to be warned not to scrape to the edges when de-coking pistons - a rim of carbon in a used engine can help keep things sealing properly, the old guys would say...
....the use of high detergent oil in an old engine was counselled against for similar reasons...
so my hypothesis goes like this:
the supertech 100-1 stuff that tom used has done such a good job of cleaning things out of his older engines that they are <too clean>
the benefits of carbon sealing have gone ? washed and burned away by an oil that does too good a job for an old engine?