Last time I used Valvoline Synthetic 85/140.

does anyone have any idea how that stack up against the Walmart brand?

also I am in Texas. So many choices on the weight - what are you guys using?

Thanks

 

I'm in Idaho and I changed all my boxes to Redline 75w90. Got a 5 gallon pail a few years back at Amazon for under $100.

 

This might be overkill, however my independant LR mechanic changed mine out to Redline Shockproof Oil for the diffs (F/R) and transfer case. She does hum down the road just fine and the slight klink you get from letting off the accelerator then back on it is gone.

 

Did mine in Sofla using Mobil 1 85/140 from Graingers. Happy with it.

 

I am unsure what the Walmart brand is, fully synthetic? My rule of thumb is you get what you pay for and if you go with an off brand at a cheaper price it tends to cost you more down the road.

I personally go with Redline products from Amazon as noted by other posters. They do cost more but, that is my brand and I have full confidence in the product.

 

I am still not sure whether i should use fully synth Gear oil or not. should i still use 85/140 or 75/90?

I guess I need 7 quarters for all 3. any suggestions where I can get Gallons for reasonable price? I am not in hurry but eventually change after I replace my Transmission fluid this weekend.

Thanks

Thanks

 

A lot of folks go with the 85w-140, but the owners manual calls for 75w-90.

 

I'm not sure why everyone goes with 140 weight. When it's warm it's still extremely thick, even 90 weight probably only get around 60 when it's warm. There's a reason LR spec'd the oil they did. Same with engine oil. At the standard 210+ factory running Temps a 40 weight is prob ok but when you fix the coolant system inneficiencies and drop your running Temps a 40 weight does not change viscosity enough to flow well.

 

so many on this forum keep pushing for 140. i agree King Koopa. how about synth vs regular ?

 

X1 ................ there are a couple of conditions under which I'd run thicker diff oil, first if the diff is noisy and needs changing and you want some peace and second if it's well worn but you live somewhere where the temp rarely drops to as low as minus 5C. otherwise I'd run on 75/90 as stated by LR, be it synthetic or hypoid standard stuff.