Replace front and rear differential oil beginning at 15,000 miles?

[Andrace]

To each their own but with today's fluid technology, other than the coolant interval you suggested thats a huge waste of money, natural resources and added pollutants. Buy a high quality fluid / grease and youll be fine. Ive ran many triaxle dump trucks, dozens, excavators 1 ton , 2 ton trucks loaded down and have never had a component failure due to excessive wear from fluid breakdown or contamination.

Edited as I do agree with early break in oil changes. I also have equipment in fluid analysis program during warranty and haven't seen anything that would make me continue to change at really low intervals. I run Scaeffers or CenPeco fluids if the weight and spec is available. If not usually manufacturer stuff.

Yeah, one could probably get away with longer intervals and be just fine, but spending $250 on fancy fluids in a year seems like a super cheap way to keep ahead of long-term issues.

I probably spend more on oils for my racing kart engines than I do for my truck in a year, and it's very apparent how drain intervals and fluid quality factor into component life in those applications.

Too soon is always better than too late.

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[izzy]

Newer models use 75W synthetic product for the t case. I confirmed this with the shop lead at my dealer.
Toyota has a lock on this product, no aftermarket option available in Canada.

You bring your own stuff and then down the road maybe something comes up with the t case and they trace it back to "cust supplied fluids" and ur toast.

Dealerships will find any excuse to deny warranty.

I don't think you got taken for a ride, it is what it is when you go to a dealer for work. Once again you're set for 30,000 miles lol that's a long time.

 

[BearTacos]

Yeah, one could probably get away with longer intervals and be just fine, but spending $250 on fancy fluids in a year seems like a super cheap way to keep ahead of long-term issues.

I probably spend more on oils for my racing kart engines than I do for my truck in a year, and it's very apparent how drain intervals and fluid quality factor into component life in those applications.

Too soon is always better than too late.

I just cringe due to all the needed containments put back into the environment. Most of these thoughts are from 1960s knowledge. If you do a fluid analysis of good oil you will see that it does not break down much if any within a 10k service range on oil 60k plus on differentials. I go through 500 plus gallons of engine oil alone in a year and change at regular intervals on the hardest working engines out there, dump trucks. Dusty environments running at max gvw 50% of the time lugging and going through the rpm ranges up and down the gear tree. My 03 yota had 350k plus on it when I sold it with just reg maintenance, 200k plus on a few super duty trucks that weigh 11k with service body and tools towing 16k trailers daily.

 

[Andrace]

I just cringe due to all the needed containments put back into the environment. Most of these thoughts are from 1960s knowledge. If you do a fluid analysis of good oil you will see that it does not break down much if any within a 10k service range on oil 60k plus on differentials. I go through 500 plus gallons of engine oil alone in a year and change at regular intervals on the hardest working engines out there, dump trucks. Dusty environments running at max gvw 50% of the time lugging and going through the rpm ranges up and down the gear tree. My 03 yota had 350k plus on it when I sold it with just reg maintenance, 200k plus on a few super duty trucks that weigh 11k with service body and tools towing 16k trailers daily.

You're right, oil analysis is super important, especially application-specific analysis.
Watch this.

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