Royal Purple fluids
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Senior Member
Joined: Sep 2007
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From: The Barbary Coast
Royal Purple fluids
On the Royal Purple website, they have republished an article from: fordtruckworld.com http://www.royalpurple.com/ford-truck-world.html
The writer claims the following:
Now my question is this:
The writer claims the following:
We used Royal Purple Motor Oil 5W30 in the engine, Max ATF in the transmission, and 75W90 Max-Gear in the differential. After everything was changed, we duplicated our MPG testing. The truck had been getting 14.8 MPG and after the change to Royal Purple, we are now getting 15.9 miles per gallon. That’s a 1.1 mpg increase and an overall 7.4% increase in mpg.
How much of this stuff do I need to buy? How many bottles, quarts, liters, gallons, et cetera, of the gear oil and transmission fluid?
I've never owned a car where I had to change out those fluids.
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Joined: Jun 2006
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From: NJ
Uhm
all those things need to be changed, ESPECIALLY the engine oil 
tranny about every 60K miles, differentials, I'm not sure. Check your owners manual for intervals and amounts of fluids. Royal Purple is expensive. I use the engine oil. it is about $8 a quart.
tranny about every 60K miles, differentials, I'm not sure. Check your owners manual for intervals and amounts of fluids. Royal Purple is expensive. I use the engine oil. it is about $8 a quart.
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Senior Member
Joined: Sep 2007
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From: The Barbary Coast
Originally Posted by waterman308
Royal Purple is expensive. I use the engine oil. it is about $8 a quart.
What I would like to know is this:
2007 F150 4.2L V6
How much of the ATF & gear oil will I have to order?
Does anyone have experience with the coolant? How much of that will I need to order?
I don't want to start the job, and then not have enough. Or order too much of that stuff - i.e. 1 case of ATF when I only need a few quarts.
http://search.americanmuscle.com/?qu...=mustangtuning
http://search.americanmuscle.com/?qu...=mustangtuning
Royal Purple 5w20 Motor Oil $6.49
Royal Purple� Motor Oil is a tough, long life, high performance oil that delivers superior protection and enhanced performance to engines. It gains its performance advantages ...
Royal Purple 'Purple Ice' Super Coolant $11.99
Purple Ice� is a high performance, synthetic, radiator coolant additive for engines. It is formulated to reduce the surface tension of the coolant, which improves heat transfe ...
Royal Purple Synchromax Manual Transmission Fluid $9.99
Synchromax� is recommended for manual transmissions that specify an automatic transmission fluid or motor oil. Synchromax� is formulated with Royal Purple's synthetic, propri ...
Royal Purple Max Gear 75w90 Gear Oil $10.99
Max-Gear� is an ultra-tough, high performance, GL-5 automotive gear oil designed to provide maximum protection to heavily loaded gears while maximizing power output throughout ...
Royal Purple Max ATF Transmission Fluid $9.99
Max ATF� is a synthetic, high performance, long life, multipurpose, transmission fluid. Max ATF� is recommended for all transmissions requiring Ford Mercon� or GM Dexron� III ...
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Joined: Feb 2007
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From: Houston, TX
"Filled up and hit the highway for the final test. After running 300+ miles we ended up with a final MPG rating of 18.4"
I just did the exhaust, intake and Edge Evo Stock Lvl2 (only adjust for tire size) and get 18.1 - 18.5 commuting to work. If I have a week with errands, it runs 17.
06 SCREW 4.6L 4x2 275-55/20
Ford synth blend
EDIT: Oops, I also have FAL eFans.
I just did the exhaust, intake and Edge Evo Stock Lvl2 (only adjust for tire size) and get 18.1 - 18.5 commuting to work. If I have a week with errands, it runs 17.
06 SCREW 4.6L 4x2 275-55/20
Ford synth blend
EDIT: Oops, I also have FAL eFans.
Last edited by dennisfranz; Oct 31, 2007 at 08:28 PM.
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Joined: Jun 2006
Posts: 350
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From: Dallas
i switched over to RP differential and manual trans fluids in my jeep last spring, and i'm quite pleased with the results...i average 18 mpg in stop-go city driving and pulled over 24 mpg at high elevations in utah/colorado last summer on the highway with the I-6 and 3.73 gears...pretty decent figures compared to others i know with similar specs...although i don't contribute all to the fluids, i think they help a bit
when it comes time to replace the diff fluids in my pickup, i'll use rp there as well
when it comes time to replace the diff fluids in my pickup, i'll use rp there as well