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3,000 or 7,500

DieselD24
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DieselD24

DieselD24

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Manufacturer recommends oil to be changed at the 7,500 mile interval along with other things. I've heard of people going to the full 7,500 and some won't even go past 3,000.I know it's a dumb question to be asking but, I can only come up with 2 conclusions to this.3,000 miles can be pretty costly but, increases engine life as it's being flushed out with new oil. I guess those who can afford will do this.7,500 will be more cost effective in the long run but, you have just doubled the contaminants introduced into the system by doing it at this time. We all know that oil serves us 4 purposes, and that is, seal, cool, lubricate, and clean. Only makes sense that all four of these lack in their respective department by extending the interval.What do you guy's think?

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guesswho512

guesswho512

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7500 miles for me. my 91 honda accord also has a 7500 mile interval also. 3000 mile oil change is a myth created by oil companies. most vehicles i have driven actually had a 5000 mile scheduled intervals, or higher :2cents:

Wild and Free

Wild and Free

Posted
Posted

Not a mile less than 7500. I Worked at a shop that serviced a fleet of dodge 24 valve cummins when I left the high milage one was at 800k lowest mileage one was 400k and they did conoco 15w40 oil and always had 10-12k on the oil changes with just a baldwin full flow filter. These were over the road rigs that pulled 40-45 foot enclosed gooseneck trailers that were loaded heavy, every rig had airbags inflated very hard.

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Mopar1973Man

Mopar1973Man

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Ok... So just for the other people that visit the site what would you guys consider a safe upper mileage limit for oil changes? This of course is using a using a good quality lubricant (petroluem based) and a quality filter like fleetguard, baldwin, etc... I know changing every 3K miles is a waste for sure... :duh:

JOHNFAK

JOHNFAK

Posted
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Ok... So just for the other people that visit the site what would you guys consider a safe upper mileage limit for oil changes? This of course is using a using a good quality lubricant (petroluem based) and a quality filter like fleetguard, baldwin, etc... I know changing every 3K miles is a waste for sure... :duh:

Based on CAJ and W&F = 10k ..... good enough for me !!! :thumb1:
dually

dually

Posted
Posted

With stock injectors 5000 to 7000.With big injectors washing down cylinders 3000 to 5000.Sorry i still go from 3000 to 4000 max.I just have a hard time trusting it over 4000.Maybe i should get blackstone to test it at 4k?

cajflynn

cajflynn

Posted
Posted

My 8k to 10k are mostly highway and that means an oil change every week and a half or two weeks. I dropped down from 20k because I got scared. WHen I head the head off at 600k the cylinders had all the crosshatching. I use delo and fleetgaurd stratopores. I dont use the non stratopore ones.

--- Update to the previous post...

My 8k to 10k are mostly highway and that means an oil change every week and a half or two weeks. I dropped down from 20k because I got scared. When I had the head off at 600k the cylinders still had all the crosshatching. I use delo and fleetgaurd stratopores. I dont use the non stratopore ones.

Heavyd1980

Heavyd1980

Posted
Posted

so me changing my oil and filter at 3k is a waste of time and money!:shrug: i dunno i think i agree with Dually it has been engrained in my mind for my entire life that 3k is time for fresh oil.

volkswagon

volkswagon

Posted
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I go 12000 km which is 7500 miles. I wouldn't be afraid of more. I did some oil samples on our tractor and at 450 hours the oil was testing perfect. The recommended interval is 250 so I think anything less than manufacturers specs is overkill.

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