What car has a nine quart sump? I know that the Northstar motors run an 8 quart sump and that is likely due to the initial motors had a relatively poor ring to wall design. But at the end of the day it is a relatively small disaplacement multi valve V-8, producing about 300 hp. So in regards to surface areas for auto-rx to work on, the northstar doesn't have internal surfaces areas to clean any different than a V-8 with a five quart capacity. I don't believe that its a clear case of auto-rx concentration to oil, as compared with ARX versus surface areas to clean.
What about Porsche? If I recall they typically take about 10 quarts - dry sump. I ask because I want to get one for my wife (in a few years once some bills are paid) and most likely will be looking the used route. Also, hope to find one that once we get it, it's in the family for a LONG time.
Likely will be asking more detailed questions down the road on this.
The important consideration is volume concentration, not surface area. Use two bottles of AutoRX.
If you only used 1 bottle, you would have to drive twice as many miles to get the same cleaning effect because only half the AutoRX molecules would be in contact with the metal surface areas at any given moment.
Frank Millers comment below about application instructions. Dewman when you are ready to order Auto-Rx I would PM Frank for the amount to use he will give you instructions to follow he is very customer friendly.
Daryl
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Thanks guys. I would LOVE to pm Frank about the Porsche, but it's still in the works! Once we do get it, want to keep it going for as long as possible.
By keeping the concentration the same i.e. by adding two bottles to a 8 qt sump, you will retain the same Auto-RX to Oil ratio as intended, thus the cleaning miles that you need to drive will remain the same as recommended by Frank.
If you lower the concentration of Auto-RX in the sump in half, it is true that the cleaning of the engine surfaces will occur, but it will take twice as many miles to get it done (5000 miles if you only add one bottle of Auto-Rx to a 8 qt sump).
I'm not sure I agree. I think you base the amount of Auto-Rx on the engine to be cleaned and if it has a larger sump then so much the better for the process. The contaminants have more places to go. Actually I think that a larger sump is one of the best things one can do for a given engine. So until I am convinced otherwise a larger sump does not mean automatically that you would use more Auto-Rx for the same job.
2 bottles of Auto-Rx is 24 ounces (each bottle holds 12 ounces) at a ratio of 2 ounces of Auto-Rx per quart of oil. You have more than enough to begin cleaning. Follow the application for your engine. I guarantee it will do a fine job.Plus you still have 4 ounces(sludge) 3 ounces cleaning left for the maintenace application the most important part of the complete Auto-Rx Process.
Larry, Use of Auto-Rx can be quantified by two main metrics. 1. "Contaminant Holding Capacity": The more Auto-RX, the more contaminants can be liquified/held/rinsed.
2. "Rate or Speed of Cleaning": How fast it can clean. The more Auto-RX, the faster it can get the engine its "100%" clean state.
Argument for 1 bottle no matter the sump size: There are x grams of contaminants that can be held by the Auto-Rx regardless of sump size. So if you add more bottles, there would be no more contaminant to hold so the added Auto-Rx is being wasted.
Argument for more bottles of Auto-Rx proportionately to sump size: Speed of cleaning action is proportional to concentration. Less cleaner means longer to clean the same amount of contaminants. So while the "contaminant holding capacity" of the Auto-Rx may not be reached, ALL the contaminants will be liquified 1 mile BEFORE the XXXX miles of the clean phase is done. This is a benefit of Franks newly recommended longer clean phase compared with his old recommendation.
I was involved in testing the two bottle dose and agree that 20 ounces may be the magic size for a lot of engines with the remaining 4 ounces for a maintenance dose. I think you need to concern yourself with the cleaning job to be done and not the sump size.
Please post your results, maintenance dose is every oil change. Did you take photos before and planning on after your finished? What made you use this application ? Thanks
Hello all, I wanted to post as I have an '83 Porsche 911. According to specs the car runs 11qt. with a dry sump. I am thinking that I will run almost 3 bottles of the AutoRx as I also need to do the accelerated version of the treatment. I am thinking of doing this because I probably wont make more than 2000 miles on the car this year. Any thougths on this? I used the product on an '86 944 Turbo and saw engine smoothness change virtually over night. I will be interested to see if it works good in an engine that is oil cooled as well as lubed. That of course assumes that in the next 2 months the 3 feet of snow in my yard goes away. If anyone else out there has a recommendation concerning the Porsche 911 please feel free to post, I can use all the help I can get
