I have looked at Dan's Ford Escort experiment using the double dose for faster cleaning and must say that the end results are quite positive. I am not so sure that a single bottle application run for the normal duration wouldn't have produced similar results. But the bottom line is that substantial top end cleansing occured on the top end of this 4 cylinder escort motor. FuelTankerman(Dan), has reported a nice gain in fuel mileage as well, in the neighborhood of 2 to 3 miles per gallon that continues to hold after the treatment.
Although it is pictorial pleasing to see the top end(valve train) clean up so nicely, it is my belief that piston ring pack cleansing is the real ticket that allowed this 200K motor to gain the additional fuel economy. I have got to ask myself, how long had it been that Dan was sacrificing 2 -3 mpg. My guess that it could have been over the last 100K of driving. I have seen too much data supporting improved compression(ring wall sealing) to think otherwize. I have also noticed these improved compression results in motor that are relatively young. When I look at the UOA of all of these test vehicles, they all indicate that internal wear is lowered as well. Lower wear rates and increased motor efficiency sounds like a real winner to me. The product more than pays for itself, in short order.
The otherside of the coin is that if you keep the ring packs clean from day 1, then you are not on the otherside of the coin, kicking yourself for not cleaning the motor sooner, like 50,000 miles ago.
When you say double dose, do you mean running 2 bottles for the clean phase instead of one, will we now see new directions for running 2 bottles instead of one.
I've seen excellent results with ARX in another Escort following the old 2 oz per quart of oil formula. Unless your really in a hurry do it the more economical 1 bottle way. Save the 2nd bottle for maintenance purposes.
I agree that the big pay off is the increased performance and economy that Dan saw with using Auto-Rx. The cleaning up of the valve train was a visual added bonus in terms of "proof", so to speak.
Brent: I just did this as an experiment. I don't know if it did any better job. I just showed what occurred under those conditions with that dosage rate. It may be viable for someone who desires quicker results. From all indications, including UOA, it's still 100% transparent in terms of owner perceptions and oil lubrication properties. I don't think Frank is going to just jump to changing the procedures with just one data point.
I personally think the product has broad flexibility in use. I don't have much to prove it, but that's the opinion I'm forming. I would still think the 2500-3k clean followed by the 3k rinse is the best deal in terms of costs, but I don't necessarily believe that it's the ONLY way to achieve great results. Some people may desire to get things over with in a shorter time frame ..and this may indeed be possible. We already know that it works over a fairly broad span of mileage at the single bottle dose. It may very well work in a variety of dosages and lengths of service ..but I imagine that it's not that simple in terms of "recommendations".
Suppose the person insists on using a PAO/ester based product? They will probably need to use it for a longer duration to get the desired results. Suppose they only do 5k OCIs ..and Auto-Rx needs more time with that formula?
Now multiply that for all the varied OCIs and all the varied oil formulations/blends and you've got something that makes a Chinese lunch menu look simple (one from column A and two from column B).
