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Either Amsoil Zrod which is designed for Vintage vehicles https://www.amsoil.com/shop/by-prod...etic-motor-oil/?code=ZRTQT-EA?zo=5959360 Or their Dominator race line https://www.amsoil.com/shop/by-prod...30-racing-oil/?code=RD30QT-EA?zo=5959360 Bith have the higher zinc for Flat Tappets...

Try the Amsoil stuff. They show it can be used in straight water and Antifreeze water mixes. Obviously works better in straight water. They list what the tests show on their page https://www.amsoil.com/shop/by-prod...coolant-boost/?code=RDCBCN-EA?zo=5959360

Originally Posted by KevinP MaxLife ATF in both of my Kia transmissions. I have probably 70K on the fluid in both and notice no change in transmission behavior. I drain/fill every 25K. It is "lifetime" fluid but I just prefer to keep the fluids clean. Do the kias have a drain? Didnt think...

Personally Id run quality Amsoil. Either OE or XL line if you are concerned about pricing.

Consider some Amsoil OE or XL line oil

Originally Posted by kwijibo My son has an extended bumper to bumper warranty on the truck and a life time on the drive train. He wanted to make sure not to screw that up. If it's standard gear oil for the front and back that will not be a problem. I had a quick discussion with the service...

Don't think there is. Also I tend to find older establishments have tighter parking than New places. I guess its because our vehicles have really grown lol That and sometimes it seems like the shopping malls have tiny spots

Originally Posted by hatt 140 for sure. I doubt you're too concerned with MPGs. If you're going to be fooling around with water/mud I'd go with the much cheaper 85w-140 conventional stuff so you can change it more often. Thanks for the suggestions. Luckily I wont be in too much water and if I...

Looks like 75w140 it is

Originally Posted by eljefino Originally Posted by 14Accent Go with the 140. My Amsoil rep told me that they actually recommend the 75w-140 in most applications, even when a 75W-90 is called for. With as beefy a setup you have, I wouldn't hesitate to run the 140. Beefy isn't the word I'd use--...

Originally Posted by zeng 5.38 gears ???? Definitely a 140. Thanks for the suggestion Yea its geared pretty low due to tire size. With the 5.38 the final ratio is still not as low of a ratio as the factory 4.10 and tire combo.

Originally Posted by gathermewool "pukled"? Pulled, yes its a typo from a phone keyboard but I think you figured that on out. Originally Posted by rubberchicken Originally Posted by gathermewool "pukled"? " GM " ? Whether a GMC Sierra or Chevy Silverado the models boil down to C/K 1500...

Have a heavily modified 97 GM K2500 that runs 40" tires and 5.38 gears, and a Detroit locker. Truck pulls occasional trailer but nothing too heavy. Its more of a play toy and cruiser. The front has a 79 Ford Dana 60, runnig. 5.38 gears, and a ARB locker Just pukled and drained some Lucas...

Originally Posted by zeng Consider ATF+4 . Isnt that a Chrysler spec? What would be benefit of that?

Ok then should i throw in the Lubeguard? Im tempted to do another pan drop since the last one was when i switched from III to VI and throw in the lubeguard at the same time.

Have a 4L80E in my 1997 truck. Truck is fairly large and has some minor engine work done to the big block. Transmission has a larger cooler installed, Mag Hytec Pan that holds about 3 extra quarts, and a Transgo HD2 shift kit. Truck has 93k on it. Ive changed the tranny fluid ancouple times via...

Originally Posted by anndel What year, make and model of the vehicle? I wouldn't pour brake fluid into the crankcase because all modern vehicles have variable valve timing solenoids controlled by oil in the crankcase. Brake fluid might damage the vvti system and other parts. It wouldn't hurt if...

So was reading a thread in a group on FB and a guy was talking about a leak. Another guy chimed in and suggested to add a teaspoon of brake fluid to swell the seals. This led me to think about High Mileage oils and seal stop additives. Looked and found Blue Devil and Bars Rear Main Seal stop...

Originally Posted by wtd I have a 1998 Chevy K3500 with the Vortec 454 and 116,000 miles and I'm currently running Castrol HM 10W-40 year round. I still get piston slap with this viscosity like I did when I used 5W-30 but it goes away. My oil pressure is pegged at 80 on the gauge when cold but...

Originally Posted by RDY4WAR Originally Posted by Smith5361 OCI? Oil Change Interval. At what mileage/time you change your oil. Lol thanks for the explanation. The truck always gets changed at 3k or just a hair over. I know it can go longer with synthetic and good filter but this usually...