Enthusiast
Rear Differential Fluids
I am going to change out my OE rear cover and go with Mag Hytech. The truck is used primarily for towing. I figure a little extra fluid won't hurt. Last time I changed my fluid I used the GM stuff. I was thinking about tracking down some Mobil 1 this time. Any opinions? Any other suggestions?
Thanks.
2002 D/A, Crew Cab S/B 4x4, Light Pewter Metalic, Built 10/12/01, Arrived 11/07/01, LineX, Husky Flaps, Husky floor liners, Lund hood protector, A.R.E. 'Z' Series cap, AutoMeter Boost and EGT gauges, Prodigy brake controller, Cougar 294rls. Member #5013
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Mobil 1 is good stuff. I use Amsoil, but know of a lot of folks using Mobil 1 without issues. It would be my first choice, if Amsoil weren't available when I need a change. You'll need 75w-90 for normal use, or 75w-140 for extreme use (hot climate, frequent very heavy towing, etc.).
Enthusiast
x2 on this!Originally Posted by DmaxMaverick
But, purty much any synthetic that meets the GM spec will work. I too am running the Amsoil 75w-90 and it's pricey when you include shipping.
I'm thinking next go round I'm gonna try the synthetic Super Tech 75w-90 that Wal-Mart sells it is waaaay cheaper and it meets the GM spec. If you are cost conscious and wanna save a few bucks this might be the way to go.
Jeff
"But officer, I ain't Speedin', I'm just flyin' low"
2001 Silverado 3500 Dually LS Ext Cab, 6.6L Diesel, Banks Stinger Kit, 4" Exhaust, VR Straps, Bilstein shocks, 255/85/16 BFG KM2s
2004 Suburban 2500 LT 6.0L 4x4, Bilstein Shocks, Federico front/rear sway bars
1996 Caprice 5.7L LT1, B4U Suspension, KYB shocks & Hotchkis sway bars, BMR RCA - alas I miss ya.
2013 Caprice PPV 6.0L
Enthusiast
Thanks for the input. If I can find it around here, I am going to try for the Mobil1. If I can't get the M1 without a bunch of running around, I'll go for something else that meets spec. Thanks again.
2002 D/A, Crew Cab S/B 4x4, Light Pewter Metalic, Built 10/12/01, Arrived 11/07/01, LineX, Husky Flaps, Husky floor liners, Lund hood protector, A.R.E. 'Z' Series cap, AutoMeter Boost and EGT gauges, Prodigy brake controller, Cougar 294rls. Member #5013
Enthusiast
Mobil 1 synthetic is top shelf stuff, can't really go wrong with that! When I did mine this past fall I couldn't find enough of the Mobil 1 syn at any given time to go that route. Same goes for the Valvoline synthetic, so I just ordered 6 qts of Amsoil. Like I said though I may try the Super Tech synthetic at Wally World...it's ALWAYS available.
Jeff
"But officer, I ain't Speedin', I'm just flyin' low"
2001 Silverado 3500 Dually LS Ext Cab, 6.6L Diesel, Banks Stinger Kit, 4" Exhaust, VR Straps, Bilstein shocks, 255/85/16 BFG KM2s
2004 Suburban 2500 LT 6.0L 4x4, Bilstein Shocks, Federico front/rear sway bars
1996 Caprice 5.7L LT1, B4U Suspension, KYB shocks & Hotchkis sway bars, BMR RCA - alas I miss ya.
2013 Caprice PPV 6.0L
Enthusiast
I have gone with Amsoil, Mobil, and GM synthetics...but the one thing I never do with all the heavy towing miles is let it get past 50K miles.
Never.
2011 Chevrolet Tahoe 5.3L daily driver
- Previous owner of two 1994 6.5L K3500s, '01, '02, and '05 6.6L K2500s, '04 C4500, '06 K3500 dually, '06 K3500 SRW, '09 K3500HD SRW, '05 Denali
- Total GM diesel miles to date : ~950K
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