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PT1, No it's not a cost issue. I can change it after a year if there is a possibility of corrosion. I just thought with the right oil it would be safe to go longer. I only started to study up and learn about motor oil a couple months ago when I decided to run synthetic in my atv's. After a look...

Gary, I never said it was sitting idle. It's just that I only drive it about 2500 per year. Two or 3 short trips aweek and one 40-50 mile trip per month. I'm sure if I was running Amsoil you would say that as long as I use an amsoil filter and change the oil at least every 2 years or 6k miles I...

One thing that might help anyone worried about ZDDP is seeing the super high values in the Motorcycle oil. One thing I don't know is if the 1700/1800 is because it was blended for motorcycles or was all "SH" or "SJ" that high back in 90's.

Way to put a pin in my ballon Steve. Some thought went into my 5 different M1 "mad scientist" mixture.

I have a '97 Explorer, it was one of the last Ford vehicles to use the old Windser 302 pushrod engine. I have always ran Mobil 1 5W30 oil with an OCI of 10k when I was driving almost all highway then 7500 when the miles were about 50/50. It hardly gets driven anymore. The last change it only had...

I'm not sure that the $19 gal RTS is wasteful compared to the $13 gal dino Rotella, at least for where I live. What would be wasteful is the 12-$14/qt. specialty shop syn oils. I'm surprised nobody fired back their support/justification for these Maxima, Belray, and Silkolene products. I'm sure...

Heavy Hitter, Thanks for the response. I know the dino HDEO's are good but I really wanted to run a syn. partly because the area I live in Colorado can get [censored] cold at night. The 5w on the syn (Rotella or Mobil Delvac 1 / Mobil 1 Turbo Diesel Truck) leads me to belive the engine is going...

I had never given a whole lot of thought to oil in my ATV's. I'd always just used 10w30 or 10w40 conventional auto oil, usually pennzoil or castrol gtx. About a month ago I decided to go with synthetic oil. I had used Mobil 1 5w30 in my Explorer for 10 years and had been very pleased with the...