Royal Purple

[omnia]

This week I switched to Royal Purple engine oil and love it. I can tell a difference in my engine performance already!! I own a 1995 Ford Explorer V6 auto transmission 4x4 with overdrive. I am very seriously considering changing my transmission fluid and differential grease over to Royal Purple as well. The vehicle has 251,000 miles on it and since I do sales during the week and also work a weekend job, it is on the road and runs 7 days a week. The vehicle is generally in good mechanical condition. I do have a problem with the OD light coming on and staying on for several days then it just goes back off. During the time it is on the transmission shifts hard. And just as mysteriously as it comes on, it goes off.

Royal Purple’s Kyle Neal has recommended the following products for my trans and diff.

Transmission- Automatic- RP Max ATF 9.5 quarts You can now double your transmission changes when you switch over to RP Max ATF.

Differential- Max Gear 75w90 2.75 quarts This can be changed at 50,000- 60,000 miles instead of the 15,000- 20,000 mile factory recommendation.

I would like any comments I could get from users of these products. Before and after pluses and negatives. Problems before, or after. Was the results users saw improvements or did the product complicate or increase problems? Would YOU recommend the switch or would you stay with Ford factory products? Please any and all comments are welcome to help me with this decision.

 

[PT1]

The MAX EZ p/s fluid is great.

 

[unDummy]

IMO, the entire RP product line is excellent.

But, I myself wouldn't blindly double any interval without UOA.

30k full flush/change for manuals/ends/xcases/automatics is a good starting point.
PSF can easily be siphoned/refilled every 6 months or so.

You need to scan your transmission for errors. You might have some wiring issues or a sensor/solenoid that is about to fail. Fix it or suffer the failure on the road.

 

[Tempest]

Quote:

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instead of the 15,000- 20,000 mile factory recommendation.

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Is that correct for your vehicle? The owners manual for my 99 Ranger states:

Quote:

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Normal Vehicle Axle Maintenance Rear axles containing synthetic lubricant and light duty trucks equipped with Ford-design axles are lubricated for life. These lubricants are not to be checked or changed unless a leak is suspected, service is required or the axle assembly has been submerged in water. The axle lubricant should be changed anytime the axle has been submerged in water.
Non-synthetic rear axle lubricants should be replaced ever 3,000 miles or 3 months, whichever occurs first, during extended trailer tow operation above 21 Celsius (70 degrees Fahrenheit) ambient and wide open throttle for extended periods above 45 mph. The 3,000 mile lube change interval may be waived if the axle was filled with 75W140 synthetic gear lubricant meeting Ford specification WSL-M2C192-A, part number F1TZ-19580-B or equivalent. Add four ounces of additive friction modifier C8AZ-19B546-A (EST-M2C118-A) or equivalent for complete refill of Traction-Lok rear axles. The rear axle lubricant should be changed anytime the axle has been submerged in water.


Police and Taxi Vehicle Axle Maintenance
Replace rear axle lubricant every 160,000 km (100,000 miles). Rear axle
lubricant change may be waived if the axle was filled with 75W140 synthetic gear
lubricant meeting Ford specification WSL-M2C192-A, part number FITZ-19580-B
or equivalent. Add four ounces of additive friction modifier C8AZ-19B546-A
(EST-M2C118-A) or equivalent for complete refill of Traction-Lok rear axles.
The rear axle lubricant should be changed anytime the axle has been submerged in water.

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Not that I believe in lifetime fills, but 20K sounds short.

Also, don't forget about your front dif!