h2odrx
Anti-O
I hear ya! and still believe it changes itself!
Oil change?
- Thread starter h2odrx
- Start date
lwillson
Registered User
I think it circulates enough to not warrant sucking it out every time, but if you do the math, if its 3 litres out of 17 that isn't changed during an oil change, that's 17% of the engine oil that is not changed during a regular oil change.
The part I dont get is at what stage during an oil change would you do this part of the service? if the sump oil is circulating like it should, and you suck out and refill the reservoir with new oil, start the engine, wont you be moving dirty sump oil through the reservoir?
If you change the sump oil first, then suck out and replace the oil in the reservoir, and start the engine, you will now have the dirty oil in the head back in the new sump oil.
I cant see myself doing this process every oil change, but if I had a vacuum pump, I might be tempted to do it every 3 or 4 oil changes. I notice on my engine that towards the time for an oil change, my fuel economy goes down.
The part I dont get is at what stage during an oil change would you do this part of the service? if the sump oil is circulating like it should, and you suck out and refill the reservoir with new oil, start the engine, wont you be moving dirty sump oil through the reservoir?
If you change the sump oil first, then suck out and replace the oil in the reservoir, and start the engine, you will now have the dirty oil in the head back in the new sump oil.
I cant see myself doing this process every oil change, but if I had a vacuum pump, I might be tempted to do it every 3 or 4 oil changes. I notice on my engine that towards the time for an oil change, my fuel economy goes down.
h2odrx
Anti-O
I was thinking those same things... I guess you drain oil, suck out and I think you can suck out the heads too? then refill and enjoy!
BigRigTech
Diesel junky
HUEI engines always are down on power and fuel economy near a service interval....The small CAT's are the same way.
lwillson
Registered User
Why is that? It has bothered me since I noticed it happening
h2odrx
Anti-O
thinner oil effects fuel psi?
BigRigTech
Diesel junky
Injection pressure is affected by the oil viscosity.
lwillson
Registered User
Thats what I figured, but then I dont understand how guys can use a bypass filter and go 10,000 miles without an oil change. Youre not improving your viscosity by filtering it, youre just cleaning it.
BigRigTech
Diesel junky
Bypass fiters work, the numbers prove it if the oil is lab tested....It's the same as being constipated or having the runs - which one flows better and faster?.
h2odrx
Anti-O
Bypass fiters work, the numbers prove it if the oil is lab tested....It's the same as being constipated or having the runs - which one flows better and faster?.
lwillson
Registered User
Sorry, I thought I ended my sentence with a question mark, instead of a period. Your analogy makes sense though.
BigRigTech
Diesel junky
Just trying to make it so simple you guys would get a laugh...
h2odrx
Anti-O
Remember he is new here......
tonkadoctor
Full Access Member
Bypass fiters work, the numbers prove it if the oil is lab tested....It's the same as being constipated or having the runs - which one flows better and faster?.
He's right.
Oil doesn't wear out, it gets contaminated by soot, acid, fuel, metal wear particls and combustion gasses. Any reduction of these will prolong the life of the oil....... and the engine.
If you could completely eliminate the contamination you'ld never have to change the oil.
BigRigTech
Diesel junky
Tonka, the only thing I would add is that there are certain additives in the oil that burn off during combustion and that is the reason the oil needs to be changed beside contamination...In theory ofcourse.
