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RP Max ATF or Amsoil SS Fuel Efficient Trans fluid? #5306968 12/29/19 08:58 AM
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nwoodco1 Offline OP
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Hello all! I am trying to decide between Royal Purple Max ATF or amsoil signature series fuel-efficient synthetic automatic transmission fluid. They both meet the specs for my fluid and have a similar price. Is one better than the other? Thanks!

Re: RP Max ATF or Amsoil SS Fuel Efficient Trans fluid? [Re: nwoodco1] #5306970 12/29/19 09:01 AM
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Originally Posted by nwoodco1
Hello all! I am trying to decide between Royal Purple Max ATF or amsoil signature series fuel-efficient synthetic automatic transmission fluid. They both meet the specs for my fluid and have a similar price. Is one better than the other? Thanks!


What is the vehicle? Both are probably fine fluids, though I have never used either.


- 00 Honda Accord - 5w-20 Maxlife FS - LG Biotech - Honda DW-1
- 05 Infiniti G35 - 5w-30 PU - LG Biotech - Maxlife ATF - LG Red
Re: RP Max ATF or Amsoil SS Fuel Efficient Trans fluid? [Re: nwoodco1] #5307000 12/29/19 09:46 AM
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Mainia Offline
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Redline or Amsoil would be my choice....Royal Purple.....No.


2018 Lowered Hyundai Kona AWD 1.6T
2014 Toyota Rav4 AWD
2005 Honda Civic
Re: RP Max ATF or Amsoil SS Fuel Efficient Trans fluid? [Re: nwoodco1] #5307012 12/29/19 10:04 AM
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Info: vehicle, how/where is it driven, (mountains, towing, stop & go) how long will you run the fluid ?

Re: RP Max ATF or Amsoil SS Fuel Efficient Trans fluid? [Re: nwoodco1] #5307028 12/29/19 10:29 AM
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kschachn Online Content
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Originally Posted by nwoodco1
Hello all! I am trying to decide between Royal Purple Max ATF or amsoil signature series fuel-efficient synthetic automatic transmission fluid. They both meet the specs for my fluid and have a similar price. Is one better than the other? Thanks!

Just be aware that neither one of the fluids you mention have any actual specifications or approvals, both are "recommended for" applications that require certain specs or approvals. Given that, there is no real evidence either one is better or worse than Maxlife synthetic ATF which can be purchased at Walmart for much less than Amsoil or Royal Purple.


1994 BMW 530i, 251K
1996 Honda Accord, 280K
1999 Toyota Sienna, 430K
2000 Toyota ECHO, 284K
Re: RP Max ATF or Amsoil SS Fuel Efficient Trans fluid? [Re: kschachn] #5307042 12/29/19 10:52 AM
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nwoodco1 Offline OP
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Originally Posted by kschachn
Originally Posted by nwoodco1
Hello all! I am trying to decide between Royal Purple Max ATF or amsoil signature series fuel-efficient synthetic automatic transmission fluid. They both meet the specs for my fluid and have a similar price. Is one better than the other? Thanks!

Just be aware that neither one of the fluids you mention have any actual specifications or approvals, both are "recommended for" applications that require certain specs or approvals. Given that, there is no real evidence either one is better or worse than Maxlife synthetic ATF which can be purchased at Walmart for much less than Amsoil or Royal Purple.

I have the ZF HP626 in my LR3. I will be doing some towing but generally just around town.

Re: RP Max ATF or Amsoil SS Fuel Efficient Trans fluid? [Re: kschachn] #5307043 12/29/19 10:52 AM
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nwoodco1 Offline OP
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Originally Posted by kschachn
Originally Posted by nwoodco1
Hello all! I am trying to decide between Royal Purple Max ATF or amsoil signature series fuel-efficient synthetic automatic transmission fluid. They both meet the specs for my fluid and have a similar price. Is one better than the other? Thanks!

Just be aware that neither one of the fluids you mention have any actual specifications or approvals, both are "recommended for" applications that require certain specs or approvals. Given that, there is no real evidence either one is better or worse than Maxlife synthetic ATF which can be purchased at Walmart for much less than Amsoil or Royal Purple.

Good to know.

Re: RP Max ATF or Amsoil SS Fuel Efficient Trans fluid? [Re: RevelationLion] #5307045 12/29/19 10:53 AM
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nwoodco1 Offline OP
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Originally Posted by kschachn
Originally Posted by nwoodco1
Hello all! I am trying to decide between Royal Purple Max ATF or amsoil signature series fuel-efficient synthetic automatic transmission fluid. They both meet the specs for my fluid and have a similar price. Is one better than the other? Thanks!

Just be aware that neither one of the fluids you mention have any actual specifications or approvals, both are "recommended for" applications that require certain specs or approvals. Given that, there is no real evidence either one is better or worse than Maxlife synthetic ATF which can be purchased at Walmart for much less than Amsoil or Royal Purple.

Good to know.
Originally Posted by RevelationLion
Originally Posted by nwoodco1
Hello all! I am trying to decide between Royal Purple Max ATF or amsoil signature series fuel-efficient synthetic automatic transmission fluid. They both meet the specs for my fluid and have a similar price. Is one better than the other? Thanks!


What is the vehicle? Both are probably fine fluids, though I have never used either.

have the ZF HP626 in my LR3. I will be doing some towing but generally just around town.

Re: RP Max ATF or Amsoil SS Fuel Efficient Trans fluid? [Re: nwoodco1] #5307078 12/29/19 11:50 AM
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dogememe Offline
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I've used Royal Purple Max ATF with good results in several older vehicles that specify a standard viscosity ATF (Dexron III, Mercon V, etc), and I use AMSOIL SS FE ATF in my 2010 Ford Escape that specifies a low viscosity ATF (Mercon LV). Both are good quality fluids, and depending which one in suitable for your application, you can't go wrong either way! Royal Purple's product is readily available in retail locations while AMSOIL's has to be ordered off their website in most cases... it just depends what better meets your needs.

Last edited by dogememe; 12/29/19 11:52 AM.

2010 Ford Escape 2.5 ~102K Miles: Castrol Magnatec 5W-20, Wix Filter.
2001 Chevy Suburban 5.3 ~290K Miles: Valvoline Maxlife 10W-30, ACDelco Filter.
Re: RP Max ATF or Amsoil SS Fuel Efficient Trans fluid? [Re: nwoodco1] #5307080 12/29/19 11:53 AM
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mattwithcats Offline
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I use a TES-295 fluid in my Saturn, which specs Dexron III...

Mobil 1 Delvac ATF...

https://lubricants.mobil.com/en/mob...c-transmission-fluids/mobil-delvac-1-atf


2009 Smart Pure
Pennzoil Platinum Euro 0W-40, Wix XP 51356 filter, 45 mpg...
185/55R15 General HP tires, "H" speed rated, 44 psi (300 kpa)
Re: RP Max ATF or Amsoil SS Fuel Efficient Trans fluid? [Re: nwoodco1] #5307115 12/29/19 12:44 PM
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So it takes Dex III ? The Mobil 1 ATF was always a good substitute in something a tad thicker than newer Dexron … although depending on which formula … at operational temps Dex VI can be as thick.

Research several brands to look at physical properties … and don’t assume others are not up to the task.

Re: RP Max ATF or Amsoil SS Fuel Efficient Trans fluid? [Re: nwoodco1] #5307131 12/29/19 01:10 PM
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Donald Offline
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I use the Amsoil fuel efficient ATF in pickup AT and the regular Amsoil ATF in transfer case.

Amsoil SVG in both diff.

I know the Amsoil is high quality and you don't use much on a yearly basis. So I am fine even if it costs a little more per QT.


2015 Ford F-250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: RP Max ATF or Amsoil SS Fuel Efficient Trans fluid? [Re: kschachn] #5307179 12/29/19 02:25 PM
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madeej11 Offline
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Originally Posted by kschachn
Originally Posted by nwoodco1
Hello all! I am trying to decide between Royal Purple Max ATF or amsoil signature series fuel-efficient synthetic automatic transmission fluid. They both meet the specs for my fluid and have a similar price. Is one better than the other? Thanks!

Just be aware that neither one of the fluids you mention have any actual specifications or approvals, both are "recommended for" applications that require certain specs or approvals. Given that, there is no real evidence either one is better or worse than Maxlife synthetic ATF which can be purchased at Walmart for much less than Amsoil or Royal Purple.

Like the man said it's not what you think you know, it's what you can prove. Certs and approvals are boss.

Re: RP Max ATF or Amsoil SS Fuel Efficient Trans fluid? [Re: nwoodco1] #5307185 12/29/19 02:37 PM
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To answer your question, I don't know if either is better than the other. I would run the Amsoil as I have an extremely great local dealer. I trust Amsoil more. I'm like Mania. I wouldn't use Royal Purple. My second choice would be RedlIne.


'98 LEX LS400 305K
'02 4Runner 250K
'05 Lex LS430 90K
'07 Lex GX470 70K

Shell Gas and Truck 5W-30
PP HM 10W-30
Toyota ATF's and Coolant
Amsoil Gear Oil and Grease
Re: RP Max ATF or Amsoil SS Fuel Efficient Trans fluid? [Re: kschachn] #5320250 01/11/20 08:44 PM
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WillB Offline
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Originally Posted by kschachn
Originally Posted by nwoodco1
Hello all! I am trying to decide between Royal Purple Max ATF or amsoil signature series fuel-efficient synthetic automatic transmission fluid. They both meet the specs for my fluid and have a similar price. Is one better than the other? Thanks!

Just be aware that neither one of the fluids you mention have any actual specifications or approvals, both are "recommended for" applications that require certain specs or approvals. Given that, there is no real evidence either one is better or worse than Maxlife synthetic ATF which can be purchased at Walmart for much less than Amsoil or Royal Purple.

I looked up the ATF+4 approved License list, and came across the Not approved list - Amsoil and RP are not approved ATF+4.

No universal trans fluid should be used.


Thanks,

Will

2016 Jeep Sahara JKU
2017 Ram 1500 Crew Cab 4x4 Hemi 5.7 6 Speed Auto - Traded.
2011 GMC 1500 CC 4WD 4.8 - Traded.

04 GMC 1500CC Z71 350,000km 217,000 miles - Retired.
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