Oil Change Time ... Which and Why >>
- Thread starter ScottB
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Meticulous-Detail
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- Nov 15, 2011
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I think they are both great, so price would be the deciding factor. I have castrol edge in the 5.4, amsoil ATF in tranny and royal purple in the rear end.
Porsche Pilot
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- Jun 25, 2010
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Porsche specs Mobil 1. I thought I would be cheap one time and used another brand. Car ran too hot. Mobil 1 for me all the way. There is a reason car makers spec certain brands and viscosity. They know a lot more than me!
Sent via telepathy.
Sent via telepathy.
BobbyG
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- Dec 29, 2009
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Hey Scott,
Amsoil, Mobil 1, Royal Purple are all great 100% synthetic and will provide the very best in lubrication and protection. I've used all three and see no difference in performance, oil consumption, or fuel economy in my 2004 Z06 Corvette, my 1999 Dodge Dakota, or my 2003 Toyota Camry...
Z06 Corvette
When I changed the fluids in my Z06 I went with Royal Purple and use it to this day. I did discover that the 6 speed shifts smoother and more consistent using Royal Purple over stock GM lubes.
Dodge Dakota SLT 4X4
My Dakota uses Mobil 1 in the motor and Amsoil full synthetic in the automatic transmission, front and rear differential.
Toyota Camry XLE
The Camry uses Mobil 1 in both the engine and transmission...
Amsoil, Mobil 1, Royal Purple are all great 100% synthetic and will provide the very best in lubrication and protection. I've used all three and see no difference in performance, oil consumption, or fuel economy in my 2004 Z06 Corvette, my 1999 Dodge Dakota, or my 2003 Toyota Camry...
Z06 Corvette
When I changed the fluids in my Z06 I went with Royal Purple and use it to this day. I did discover that the 6 speed shifts smoother and more consistent using Royal Purple over stock GM lubes.
Dodge Dakota SLT 4X4
My Dakota uses Mobil 1 in the motor and Amsoil full synthetic in the automatic transmission, front and rear differential.
Toyota Camry XLE
The Camry uses Mobil 1 in both the engine and transmission...
DaveT435
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- Jun 23, 2012
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I have a guy that used to work for me that is now a mechanic. I was considering Royal Purple. If I remember correctly the Royal Purple didn't have the same ratings. I wish I could remember...but he showed me on the bottle. He told me it was an older generation oil. That was about 18 months ago so things may have changed...
MinnBobber
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- Jul 12, 2012
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Mobil 1.
Mercedes does a huge amount of testing of all their fluids (oil, power steering, brakes, tranny,etc) and their engines come with Mobil1 and Mobil1 recommended.
IMO, it is clearly the best out there.
Mercedes does a huge amount of testing of all their fluids (oil, power steering, brakes, tranny,etc) and their engines come with Mobil1 and Mobil1 recommended.
IMO, it is clearly the best out there.
ScottB
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- Mar 3, 2006
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- Thread starter
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I am running Royal Purple currently but the price increase was crazy (I need to do 4 cars this weekend) so I jumped at some Amsoil at cost. I remember RP offered it was DEXOS compliant but would not pay the costs associated with testing/using the certification in addition to GM's new stress testing of oil. It appears on the newer bottles it has changed those views.
Bigbull2984
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- Apr 14, 2012
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Amsoil, reason my even the Acura dealer was surprised how well my car ran with 171k miles..(not saying Mobil1 wouldn't do that)
In my new Ac Ive been using the Amsoil XL. Try the SSO 0w30 instead of 5W30.
In my new Ac Ive been using the Amsoil XL. Try the SSO 0w30 instead of 5W30.
Bigbull2984
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- Apr 14, 2012
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I have seen alot of UOA showing RP starts to shear alot.
chris.ganucheau
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- Mar 22, 2012
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Amsoil is the better oil but you will have no problem with mobil 1. I run mobil 1 in my car but there isn't anyone around where i live that sells amsoil.
Jaretr1
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- Jan 29, 2011
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Ah, the old oil debate. I have used Mobil 1 in my RSX since the first oil change, and now with 58k miles, there is still nary a sign of a leak. I used Mobil 1 in my 91 SE-R with 120+k miles on it. That car always seemed to have small leaks around the valve cover, so when I did replace the gasket, inside it still looked like a new engine. No buildup or sludge whatsoever.
Having said that, I am sure there is something to be said about the more expensive oils being better performing and longer lasting. I have used Redline transmission fluids and always felt a "slicker" feel to the shifter.
There is a lot of marketing might as to why Mobil 1 is the factory fill for so many performance brands. Cost for the manufacturers, cost and ease of aftermarket availability and reputation are probably right up there or above performance in the equation.
I use Mobil 1 because I know it is a good quality, and its usually the least expensive of the "brand name" synthetic oils at Walmart. I like to change my oil often (probably much more the necessary) so the cost is an issue. However, using a synthetic vs conventional will provide better protection.
A few interesting tidbits I learned in the auto repair industry industry. First off, GM licences the Dexos moniker. For companies to put Dexos certified on their products, they have to pony up a hefty sum to GM for that right. Mobil is one of those companies. Valvoline for example isn't, but their synthetic blend actually meets the Dexos technical requirements. They just did not want to pay GM for the label on their bottles.
Also, Mobil is an oil producing company, which means they are actually pumping the oil they use in their products. All of the small companies, and many of the large ones as well ( like Valvoline ) for instance do not produce oil, so they purchase all their base stocks. Quality arguments go both ways naturally. However, its a reason you probably wont see a company like Mobil using recycled oil in their products, and why Valvoline will for instance
Having said that, I am sure there is something to be said about the more expensive oils being better performing and longer lasting. I have used Redline transmission fluids and always felt a "slicker" feel to the shifter.
There is a lot of marketing might as to why Mobil 1 is the factory fill for so many performance brands. Cost for the manufacturers, cost and ease of aftermarket availability and reputation are probably right up there or above performance in the equation.
I use Mobil 1 because I know it is a good quality, and its usually the least expensive of the "brand name" synthetic oils at Walmart. I like to change my oil often (probably much more the necessary) so the cost is an issue. However, using a synthetic vs conventional will provide better protection.
A few interesting tidbits I learned in the auto repair industry industry. First off, GM licences the Dexos moniker. For companies to put Dexos certified on their products, they have to pony up a hefty sum to GM for that right. Mobil is one of those companies. Valvoline for example isn't, but their synthetic blend actually meets the Dexos technical requirements. They just did not want to pay GM for the label on their bottles.
Also, Mobil is an oil producing company, which means they are actually pumping the oil they use in their products. All of the small companies, and many of the large ones as well ( like Valvoline ) for instance do not produce oil, so they purchase all their base stocks. Quality arguments go both ways naturally. However, its a reason you probably wont see a company like Mobil using recycled oil in their products, and why Valvoline will for instance
modo
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- Nov 2, 2009
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amsoil
why? better tbn and used oil analysis from comparing both in my vehicles. you can go over here and look at other people uoa and compare etc
Used Oil Analysis - Gasoline - Bob Is The Oil Guy
why? better tbn and used oil analysis from comparing both in my vehicles. you can go over here and look at other people uoa and compare etc
Used Oil Analysis - Gasoline - Bob Is The Oil Guy
builthatch
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- May 25, 2008
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FYI, has nothing to do with the brands posted, but you can get a five quart gontainer of pennzoil ultra synth, their best, for ~$28 and change at walmart. then, pennzoil offers a $25 rebate for five quarts of ultra if you sign up for their oil warranty thing, so the oil will cost you like three dollars.
i've peeped tons of UOAs with ultra and in many different performance vehicles it yields great results. obviously it depends on how you drive and what you drive, but you can get incredibly long intervals out of ultra.
i've peeped tons of UOAs with ultra and in many different performance vehicles it yields great results. obviously it depends on how you drive and what you drive, but you can get incredibly long intervals out of ultra.
flyinion
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- May 5, 2011
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If money is no object, Amsoil. Otherwise the Mobile 1. Both are good. Over on the Jeep forums there is a huge oil testing post and Amsoil was at/near the top (depending on "flavor") with Mobile 1 being very good as well. Many of the Jeep guys are using Mobile 1 synthetic. Obviously a Jeep will not be in high-rev situations but they are frequently in high torque settings with a lot of heat generation. FWIW Royal Purple (since I saw it mentioned a few times) scored very low and I definitely wouldn't consider it worth the price they want for it.
