I couldn’t agree with you more on your post.. the prople that push their oil changes to 10,000 miles (I can guarantee they go further than that but won’t admit it) are the same ones that’ll lie straight faced to the mechanic when their truck explodes scratching their heads and say “I change the oil every 5K. Duhhh… also the same ones that drink the milk out of the fridge a month past it’s expiration date. Lol. Lol. Ya just can’t confuse some individuals with common sense!! They either got it or don’t got it!! Cheers Brutha!!FWIW. Things to consider.....
Ask an Engineer if the extended oil change interval will allow the engine to survive the 100 kmile warranty period. His answer will be Yes, most will.
Will the engine run for 300K? Maybe. 200K? Maybe.
Marketing can now claim their trucks are "lower maintenance". Not many manufacturers warranty over 100 kmiles.
It all comes down to managing the risk and cost to the manufacturer. As the interval is extended, the risk of failure increases. As mileage increases, the risk of failure increases.
To me. A DIY oil change only costs about $35 2X/year using a 5K interval. A failed engine due to oil breakdown will cost well into the $5K range. That is equivalent to 142 oil changes or about 70 years or 710 kmiles.
So, you do a change at a 10k interval to save $35/year. Your risk (or the next owner) is somewhere down the road an oil breakdown will fail the engine. Now, you have a problem......just to save $35/year. That is less than $3/month.
It isn't too $$wise to extend oil changes.
To me, saving $3/month to gamble a $5K repair.......just ain't worth it.
Remember, this type of failure is not immediate. It is a failure from accumulations.