So why waste your money on it?
I'm going to suggest that perhaps the reason he's not noticed a difference is because the additive is keeping the system at it's best level, and therefore it can't get "better" than where it's at; hence no discernable change. Plus, if the system is being presumably kept very clean, he's also not seeing a degradation in fuel economy over time.
Systems which don't get cleaning additives will likely see a very small and subtle change over long periods of time. They slowly get dirtier with the passing of years. Someone who then, after years of not treating the system, suddenly decided to start using a PEA product for cleaning the fuel system, might possibly see a reasonly detectable change.
So the difference is ...
- if the system is kept clean all the time using PEA, there's really no difference to notice; the system stays status-quo in a constant clean state.
- versus someone who uses the cleaner after some period of neglecting the system, may be able to tell a difference from PEA use.
PEA is not snake oil; it is effective at it's job. The Gumout experiment which wwillson went to a few years back was very convincing in it's ability to clean the injectors and the cumbustion chamber; there's an older write up on it here somewhere on BITOG. However, you have to understand that PEA does not work miracles overnight generally; it cleans slowly and methodically. It's very doubful that anyone would easily notice and change over a day or even a week using the typica doses. The cleaning take place so slowly that it's hard to discern unless used and uber-high concentrations; not recommended. Gumout had a produce called "One and Done"; it was their highest concentration of PEA in bottle form, made to be used once a year, but they took it off the market. Why? Probably because selling one bottle a year versus selling one for every OCI makes for different sales opportunities. They do have a high-mileage version now; probalby just a higher does of PEA. I contacted them once to find out how much PEA was in each product by concentration level; they would not tell me; otherwise I could figure out how many bottles of one equaled another ...
BTW, the PEA in Gumout is the same active ingredient in Techron.
The key to using PEA is more as a preventative measure than an reactive afterthought. If used regularly it can aciheve it's task much easier and with more consistiency than trying to dump a lot in after a few years of doing nothing.
