Which one would you trust?
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Record Breaker
Joined: Aug 2007
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From: TN
Which one would you trust?
Alright gentlemen and ladies if there are any,
Who would you trust when it comes to the differential gear oil? I have 3 different sources, and I'm not sure which one to go with:
The official Ram service manual says:
Front Axle:SAE 75W-140 SYNTHETIC
Rear Axle: Thermally StableSAE 80W-90 or SAE 75W-140 SYNTHETICfor HD/towing applications
Amsoil's reference says:
Front Axle: SAE 80W-90 SYNTHETIC, Severe Gear 75W-90, or SAE 75W-90 SYNTHETIC
Rear Axle: Severe Gear 75W-90, SAE 75W-90 SYNTHETIC, or Severe Gear 75W-110
Royal Purple's reference says:
Front/Rear Axle: SAE 75W-90 SYNTHETIC
(no mention of different weight for towing)
I will be doing SOME towing but not constantly...
[sm=feedback.gif]
Who would you trust when it comes to the differential gear oil? I have 3 different sources, and I'm not sure which one to go with:
The official Ram service manual says:
Front Axle:SAE 75W-140 SYNTHETIC
Rear Axle: Thermally StableSAE 80W-90 or SAE 75W-140 SYNTHETICfor HD/towing applications
Amsoil's reference says:
Front Axle: SAE 80W-90 SYNTHETIC, Severe Gear 75W-90, or SAE 75W-90 SYNTHETIC
Rear Axle: Severe Gear 75W-90, SAE 75W-90 SYNTHETIC, or Severe Gear 75W-110
Royal Purple's reference says:
Front/Rear Axle: SAE 75W-90 SYNTHETIC
(no mention of different weight for towing)
I will be doing SOME towing but not constantly...
[sm=feedback.gif]
Thread Starter
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Record Breaker
Joined: Aug 2007
Posts: 1,330
Likes: 1
From: TN
RE: Which one would you trust?
I saw that Coastal at Autozone, but I really don't like to use cheap brands unless I am changing it often. Since I won't be changing the diffs again for another 36K, I want to put a good synthetic in it...[8D]
Record Breaker
Joined: Jul 2006
Posts: 2,440
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From: PA
RE: Which one would you trust?
ORIGINAL: Ram2K1
Alright gentlemen and ladies if there are any,
Who would you trust when it comes to the differential gear oil? I have 3 different sources, and I'm not sure which one to go with:
The official Ram service manual says:
Front Axle:SAE 75W-140 SYNTHETIC
Rear Axle: Thermally StableSAE 80W-90 or SAE 75W-140 SYNTHETICfor HD/towing applications
Amsoil's reference says:
Front Axle: SAE 80W-90 SYNTHETIC, Severe Gear 75W-90, or SAE 75W-90 SYNTHETIC
Rear Axle: Severe Gear 75W-90, SAE 75W-90 SYNTHETIC, or Severe Gear 75W-110
Royal Purple's reference says:
Front/Rear Axle: SAE 75W-90 SYNTHETIC
(no mention of different weight for towing)
I will be doing SOME towing but not constantly...
[sm=feedback.gif]
Alright gentlemen and ladies if there are any,
Who would you trust when it comes to the differential gear oil? I have 3 different sources, and I'm not sure which one to go with:
The official Ram service manual says:
Front Axle:SAE 75W-140 SYNTHETIC
Rear Axle: Thermally StableSAE 80W-90 or SAE 75W-140 SYNTHETICfor HD/towing applications
Amsoil's reference says:
Front Axle: SAE 80W-90 SYNTHETIC, Severe Gear 75W-90, or SAE 75W-90 SYNTHETIC
Rear Axle: Severe Gear 75W-90, SAE 75W-90 SYNTHETIC, or Severe Gear 75W-110
Royal Purple's reference says:
Front/Rear Axle: SAE 75W-90 SYNTHETIC
(no mention of different weight for towing)
I will be doing SOME towing but not constantly...
[sm=feedback.gif]
Front Axle:SAE 75W-140 SYNTHETIC , same for the rear axle,
advanceautoparts has mobil gear syn 75w-140 15.50 QT.
Thread Starter
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Record Breaker
Joined: Aug 2007
Posts: 1,330
Likes: 1
From: TN
RE: Which one would you trust?
ORIGINAL: padodgeram
When in doubt use The official Ram service manual says:
Front Axle:SAE 75W-140 SYNTHETIC , same for the rear axle,
advanceautoparts has mobil gear syn 75w-140 15.50 QT.
ORIGINAL: Ram2K1
Alright gentlemen and ladies if there are any,
Who would you trust when it comes to the differential gear oil? I have 3 different sources, and I'm not sure which one to go with:
The official Ram service manual says:
Front Axle:SAE 75W-140 SYNTHETIC
Rear Axle: Thermally StableSAE 80W-90 or SAE 75W-140 SYNTHETICfor HD/towing applications
Amsoil's reference says:
Front Axle: SAE 80W-90 SYNTHETIC, Severe Gear 75W-90, or SAE 75W-90 SYNTHETIC
Rear Axle: Severe Gear 75W-90, SAE 75W-90 SYNTHETIC, or Severe Gear 75W-110
Royal Purple's reference says:
Front/Rear Axle: SAE 75W-90 SYNTHETIC
(no mention of different weight for towing)
I will be doing SOME towing but not constantly...
[sm=feedback.gif]
Alright gentlemen and ladies if there are any,
Who would you trust when it comes to the differential gear oil? I have 3 different sources, and I'm not sure which one to go with:
The official Ram service manual says:
Front Axle:SAE 75W-140 SYNTHETIC
Rear Axle: Thermally StableSAE 80W-90 or SAE 75W-140 SYNTHETICfor HD/towing applications
Amsoil's reference says:
Front Axle: SAE 80W-90 SYNTHETIC, Severe Gear 75W-90, or SAE 75W-90 SYNTHETIC
Rear Axle: Severe Gear 75W-90, SAE 75W-90 SYNTHETIC, or Severe Gear 75W-110
Royal Purple's reference says:
Front/Rear Axle: SAE 75W-90 SYNTHETIC
(no mention of different weight for towing)
I will be doing SOME towing but not constantly...
[sm=feedback.gif]
Front Axle:SAE 75W-140 SYNTHETIC , same for the rear axle,
advanceautoparts has mobil gear syn 75w-140 15.50 QT.
Veteran
Joined: Jan 2007
Posts: 307
Likes: 0
From: Wisconsin
RE: Which one would you trust?
I would go with royal purple they seem to know what they're doing. On Horsepower Tv this weekend an engine picked up 8hp on an engine dyno just by changing from a general oil brand to royal purple.
They also pointed out that the w doesn't actually stand for weight it stands for winter viscosity. Just thought that was interesting i always thought it stood for weight.
They also pointed out that the w doesn't actually stand for weight it stands for winter viscosity. Just thought that was interesting i always thought it stood for weight.
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Record Breaker
Joined: Aug 2007
Posts: 1,330
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From: TN
RE: Which one would you trust?
ORIGINAL: sbrunn9
I would go with royal purple they seem to know what they're doing. On Horsepower Tv this weekend an engine picked up 8hp on an engine dyno just by changing from a general oil brand to royal purple.
They also pointed out that the w doesn't actually stand for weight it stands for winter viscosity. Just thought that was interesting i always thought it stood for weight.
I would go with royal purple they seem to know what they're doing. On Horsepower Tv this weekend an engine picked up 8hp on an engine dyno just by changing from a general oil brand to royal purple.
They also pointed out that the w doesn't actually stand for weight it stands for winter viscosity. Just thought that was interesting i always thought it stood for weight.
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Veteran
Joined: Dec 2005
Posts: 257
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From:
RE: Which one would you trust?
i just put in regular Valvoline SAE 80W-90, because i didnt feel like dropping another 10 bucks a quart, plus all i tow is a 14ft boat and a 2place trailer during the seasons so the 140 didnt make since. but if you can get the RP for 11 buck id go with the 70-90
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Record Breaker
Joined: Aug 2007
Posts: 1,330
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From: TN
RE: Which one would you trust?
I don't really want to go with anything other than 75W-140 in the front, since that is what the service manual calls for...the rear is up the air. It would be easier to go -140 in both the front and rear. That way I only have to buy 5 qts of -140 instead of 3 qts of -90 and 3 qts of -140. Make sense?
Professional
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RE: Which one would you trust?
If your running open diffs (No locker or limited slip) id run the 80w-90. if you have lockers however i suggest running the 75w-140. I run front and rear lockers in my Jeep and both of their manuals spec the heavier weight oil due to more moving parts.
