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My wife has a 07 dodge nitro 4x4 with the 3.7L motor, for the second time it is having a check engine light, no shifting (stuck in 1st gear) and weird lights going on and off (the drive selector lights). The dealership replaced a module and a relay of some sort, and problem fixed for 6mos. Now...

I am trying to add some pennzoil 2 stroke to the diesel, instead of the pricier boosters. I have read that this is safe for the engine, but how about the oil? Would there be contaminants like sulphur that would work its way into the oil? Should the OCI stay the same? I am on my 6th tank and have...

I have the 6.0 with the HEUI system, I have already decided to go with a lighter grade either synth or semi synth--no brand decided yet, still working on that-- but would that change the pressure used on the HEUI injector system? In the PCMO forum there was discussion of pressure changes due to...

Valvoline advantage blue seems to be very popular on the powerstroke forums, however I rarely have seen it mentioned here. Perhaps its marketing?? What do you guys think about the quality? anyone used it for good/bad results? Thanks,

I have a 04 Powerstroke and I just had a fuel pump changed out, the last one was making noise and not keeping fuel pressure. The dealer changed the pump and cleaned the lines and injectors, however once I got it back I have noticed a small drop in power (10-20%) depending on where you are in the...

I have a 04 F250 PSD with 84K and I have wrote on here before about oil changes, brands and intervals. I have always used mastercraft 15-40 and will be getting a 40ft RV weighs 11K empty, any recc's for oil or oci's? Things to watch out for or be careful of? The RV will not be empty and I will...

Can you really put two stroke oil in the PSD to help with lubricity and milage? Are there any long term ill effects? I would really like to know since its cheap, but I have heard that on emissions systems like my EGR system it clogs up. What do you guys think?

I have had both good and bad experiences when dealing with a dealership, however, I have recently moved to a new city and need to establish a quality relationship with a good service dept. I tried once I moved here, and I feel that I got taken for a fool. I took my truck in for an ICP sensor...

I noticed during a trip to the store that the A/C in my F250 was blowing cold at idle, but as soon as I hit the gas the A/C started to blow warm air. As long as the car is at idle or at a stoplight its fine, but as soon as the RPM rises over 1000, the air starts getting warmer as if the...

I have heard many times and even from the dealer that the motorcraft 15w-40 is a blended synth. I used to let dealer service the powerstroke due to it being under warranty, now I am doing my own oil changes and I want to know about the motorcraft a bit more. its a 6.0 and its always been dealer...

How long should you wait to change your oil if the mileage you put on the car is low? The dealer's little sticker gives a 3 month/3k mile reminder, and I know oil can become acidic if left over time, but it seems a waste to change the oil especially if you use high quality synth. I do not put...

I have a friend that tells me to use royal purple due to the outstanding reduction of engine heat that he experienced. 20 degrees cooler. Now, I am not sure about all that, but I have never tried the stuff, I am familiar with specific heat though, and I have not heard any talk of it in the short...

I have a question regarding OEM specs for oil vs. the charts I see for temp and service. My wife has a dodge nitro (07) and I see that in the owners manual they specify for the 3.7 liter a 5w-20 non-synth, and for the 4.0 a 10w-30/10w-40. Why would a 5w-20 be the OEM choice for oil when the...