Your RV should have a conventional drive train not unlike a light to medium duty truck. That's the chassis that most RV platforms are based on. As such, Auto-Rx is totally compatible with its engine and transmission. About the only thing that may be applicable is the propensity for RV's to sit more than they are used. Auto-Rx requires a given amount of dwell time to be effective in engines. In automatic transmissions, due to their much cleaner non-combustion environment, the effects occur sooner. If you're running your RV a decent amount and are managing two oil changes a season (around 6,000 miles), then the normal application instructions will work well for you. If you, however, are doing 3,000 miles or less per year, then I would recommend our Fast Track method. It's designed for those who engage in limited driving. Vintage cars that are, for the most part, Sunday drivers or the shorter trip user that would typically use months instead of miles. Your RV may fall into this niche. If so, the Fast Track method is simply a double dose of Auto-Rx that's run for as close to 1500 miles as practical. You may not get the (mostly) cosmetic benefits to the cleaning, but ring packs and areas under forced circulation will be taken care of. These are the essential benefits of Auto-Rx, getting oil flow restored where it may be restricted (fouled passages, stuck lifters, etc.) and freeing ring packs of hardened deposits that are present at some point in all engine's lives. The Fast Track is close enough in mileage to the automatic transmission application that you can service both @ 1500 miles. Servicing the automatic trans will require a full fluid exchange. This is easily done by the do it yourselfer in the driveway. If you've had the trans serviced before, then just a fluid exchange is required. If you've never had the transmission serviced, this would be a good time to clean the pan and replace the internal suction filter/strainer.
I would think 3 bottles of Auto-Rx should be all that are necessary for your needs. Two for the engine and 1/2 bottle (6oz) for the transmission. The remaining 6oz can be used in future oil changes after you've completed all application instructions
I'll just reiterate the engine instructions here (they're available on the web site). You'll add two bottles of Auto-Rx to your RV's sump ..drive 1500 miles and then change the oil. You will not be adding any more Auto-Rx at this time. You will then drive for as long as you please on your fresh sump. This is the rinse phase.
One side note: It is not uncommon for lifter noise (ticks, clicks, etc.) to increase briefly during the rinse phase. Don't be alarmed. This is not unusual. Oil passages receive varied volumes of oil, and are fouled to varied thicknesses. Some areas clean up faster than others. In some cases, the supply passages will take longer than the draining passages. This may produce noises even though total flow is increased. They will pass in time.
The transmission requires no rinse phase.
If you have any more questions, just hit the reply button.
Regards, Gary Allan
-- Edited by geeaea on Friday 13th of August 2010 01:31:41 PM
The only real differnce in the drive train would relate to it motoring significantly more weight. I would srmize that this would put an RV into the extreme driving conditions, where the motor and transmission have to work harder to propell the vehicle. This would make this motor and drive train more succeptable to oil degredation from the increased heat and potential for a higher degree of bow by gases. It is highly likely that oil change intervals should be shorter than the same platform propelling a lighter vehicle. By the same token an Auto-Rx application may work faster than on the lighter vehicle that is not being run under the same stress.
