Avoiding revving the engine as OCI is nearing?
- Thread starter Spetz
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My understanding was that it's more dangerous to be rough during the first 1,000 due to new anti wear layer deposit taking time. I don't see any harm late in the interval unless you're contaminated with dirt.
You can rev the car. No need to be so overprotective.
revving the engine is fine so long as:
(a)there's a load on the engine.
(b) engine has been sufficiently warmed up.
(c) there's sufficient oil pressure/lubrication to suspend all the bearings, moving parts, etc.
(d) you are not lugging your engine (overloading it)
(e) it's not oil type/base oil dependent.
Q.
(a)there's a load on the engine.
(b) engine has been sufficiently warmed up.
(c) there's sufficient oil pressure/lubrication to suspend all the bearings, moving parts, etc.
(d) you are not lugging your engine (overloading it)
(e) it's not oil type/base oil dependent.
Q.
you guys would cringe if I told you what happened at work when oil is changed on semi's by a few individuals.
some guys will change the oil on a truck as part of the pm service, then start the unit and immediately apply the throttle.
i shake my head everytime. I just start the truck and let it idle, it builds oil pressure regardless, no point in putting the pedal down. Especially if the filters aren't completely full of oil before hand.
some guys will change the oil on a truck as part of the pm service, then start the unit and immediately apply the throttle.
i shake my head everytime. I just start the truck and let it idle, it builds oil pressure regardless, no point in putting the pedal down. Especially if the filters aren't completely full of oil before hand.
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What's the fun of driving a car if you can't rev it up tight now and then? Engines are designed with an RPM redline ... use it once and a while.
And it's really not going to hurt the engine if you use good oil & filter, and keep the oil level up to where it should be.
At the end of an OCI, the oil should still be "good" ie, not completely worn out and depleted of additives. If it is, you're going too long.
Originally Posted By: 901Memphis
My understanding was that it's more dangerous to be rough during the first 1,000 due to new anti wear layer deposit taking time. I don't see any harm late in the interval unless you're contaminated with dirt.
Good post.
My understanding was that it's more dangerous to be rough during the first 1,000 due to new anti wear layer deposit taking time. I don't see any harm late in the interval unless you're contaminated with dirt.
Good post.
MolaKule
Staff member
Originally Posted By: Quest
revving the engine is fine so long as:
(a)there's a load on the engine.
(b) engine has been sufficiently warmed up.
(c) there's sufficient oil pressure/lubrication to suspend all the bearings, moving parts, etc.
(d) you are not lugging your engine (overloading it)
(e) it's not oil type/base oil dependent.
Q.
For sure!
revving the engine is fine so long as:
(a)there's a load on the engine.
(b) engine has been sufficiently warmed up.
(c) there's sufficient oil pressure/lubrication to suspend all the bearings, moving parts, etc.
(d) you are not lugging your engine (overloading it)
(e) it's not oil type/base oil dependent.
Q.
For sure!
Originally Posted By: Black_Thunder
you guys would cringe if I told you what happened at work when oil is changed on semi's by a few individuals.
some guys will change the oil on a truck as part of the pm service, then start the unit and immediately apply the throttle.
i shake my head everytime. I just start the truck and let it idle, it builds oil pressure regardless, no point in putting the pedal down. Especially if the filters aren't completely full of oil before hand.
yeah, we have a couple guys that like to rev the engine up right before they shut it down. Don't know why they do it, but I'm sure its not good for the turbo, increasing wheel speed right before you kill the engine and loose oil pressure. We used to have a kid working for us that insisted you could put the oil filters on dry. Imagine how long that would take oil pressure to build while trying to fill the oil filters up with 3 to 6 qts. Of oil:/
you guys would cringe if I told you what happened at work when oil is changed on semi's by a few individuals.
some guys will change the oil on a truck as part of the pm service, then start the unit and immediately apply the throttle.
i shake my head everytime. I just start the truck and let it idle, it builds oil pressure regardless, no point in putting the pedal down. Especially if the filters aren't completely full of oil before hand.
yeah, we have a couple guys that like to rev the engine up right before they shut it down. Don't know why they do it, but I'm sure its not good for the turbo, increasing wheel speed right before you kill the engine and loose oil pressure. We used to have a kid working for us that insisted you could put the oil filters on dry. Imagine how long that would take oil pressure to build while trying to fill the oil filters up with 3 to 6 qts. Of oil:/
If the engine consumes oil and you don't top-off so that at the end of an OCI the oil level is near the add line, you don't rev the engine to redline. Otherwise, rev to redline is okay even on the day you change your oil, after the oil is at operating temp.
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I put gargantuan filters/by-pass filters on dry all the time for years on 40+ different pieces of equipment. Big stuff too; D8/10, 988/990, 365/385, we owned all of them and more. Nothing but Rotella SAE30 or 40 even in some hydraulic systems. We would even give them throttle to build pressure faster. Never, EVER had an oil related engine problem. Not just Cat stuff either. DD, Isuzu, New Holland, JD, on and on...
I was a heavy equipment operator for 13 years, 8 of which I worked for an owner/operator that did all his own maintenance.
Originally Posted By: afoulk
Originally Posted By: Black_Thunder
you guys would cringe if I told you what happened at work when oil is changed on semi's by a few individuals.
some guys will change the oil on a truck as part of the pm service, then start the unit and immediately apply the throttle.
i shake my head everytime. I just start the truck and let it idle, it builds oil pressure regardless, no point in putting the pedal down. Especially if the filters aren't completely full of oil before hand.
yeah, we have a couple guys that like to rev the engine up right before they shut it down. Don't know why they do it, but I'm sure its not good for the turbo, increasing wheel speed right before you kill the engine and loose oil pressure. We used to have a kid working for us that insisted you could put the oil filters on dry. Imagine how long that would take oil pressure to build while trying to fill the oil filters up with 3 to 6 qts. Of oil:/
I was a heavy equipment operator for 13 years, 8 of which I worked for an owner/operator that did all his own maintenance.
Originally Posted By: afoulk
Originally Posted By: Black_Thunder
you guys would cringe if I told you what happened at work when oil is changed on semi's by a few individuals.
some guys will change the oil on a truck as part of the pm service, then start the unit and immediately apply the throttle.
i shake my head everytime. I just start the truck and let it idle, it builds oil pressure regardless, no point in putting the pedal down. Especially if the filters aren't completely full of oil before hand.
yeah, we have a couple guys that like to rev the engine up right before they shut it down. Don't know why they do it, but I'm sure its not good for the turbo, increasing wheel speed right before you kill the engine and loose oil pressure. We used to have a kid working for us that insisted you could put the oil filters on dry. Imagine how long that would take oil pressure to build while trying to fill the oil filters up with 3 to 6 qts. Of oil:/
@ the OP: I've never heard that particular old wives tale before...where did you learn this habit and what were the reasons given?
Originally Posted By: RF Overlord
@ the OP: I've never heard that particular old wives tale before...where did you learn this habit and what were the reasons given?
A first for me too.
@ the OP: I've never heard that particular old wives tale before...where did you learn this habit and what were the reasons given?
A first for me too.
Originally Posted By: Quest
revving the engine is fine so long as:
(a)there's a load on the engine.
?
What difference does that make?
revving the engine is fine so long as:
(a)there's a load on the engine.
?
What difference does that make?
Originally Posted By: Blue_Angel
Originally Posted By: Quest
revving the engine is fine so long as:
(a)there's a load on the engine.
?
What difference does that make?
That way the combustion pressure will prevent the piston from bursting through the head on it's way to space (on the compression stroke only, still just as likely to go through the head during exhaust stroke..... and all jokes aside, that's not likely)
Originally Posted By: Bamaro
IMO, that's being a bit too anal. If you cant rev it, you shouldn't be driving it.
Is this why when I take a left during the end of an OCI and turn really, really slow, locking the RPMs below 1200, that other people always honk and try to crash into me?!
Originally Posted By: Quest
revving the engine is fine so long as:
(a)there's a load on the engine.
?
What difference does that make?
That way the combustion pressure will prevent the piston from bursting through the head on it's way to space (on the compression stroke only, still just as likely to go through the head during exhaust stroke..... and all jokes aside, that's not likely)
Originally Posted By: Bamaro
IMO, that's being a bit too anal. If you cant rev it, you shouldn't be driving it.
Is this why when I take a left during the end of an OCI and turn really, really slow, locking the RPMs below 1200, that other people always honk and try to crash into me?!
Originally Posted By: RF Overlord
@ the OP: I've never heard that particular old wives tale before...where did you learn this habit and what were the reasons given?
No one told me this. I guess from reading the responses that I just have some kind of placebo effect where I feel the engine is noisier and rougher near the OCI and once new oil is put in it's instantly quieter and smoother.
From the reasoning that if the oil is old enough to cause more vibration and/or noise then it's not protecting the engine as it should.
Though it is good to hear that I can drive it all the same regardless of nearing the OCI. I do 5K OCI anyway which is what the manual says to do under extreme conditions which my car never faces. Normal conditions call for 9,300 mile OCI according to the manual.
@ the OP: I've never heard that particular old wives tale before...where did you learn this habit and what were the reasons given?
No one told me this. I guess from reading the responses that I just have some kind of placebo effect where I feel the engine is noisier and rougher near the OCI and once new oil is put in it's instantly quieter and smoother.
From the reasoning that if the oil is old enough to cause more vibration and/or noise then it's not protecting the engine as it should.
Though it is good to hear that I can drive it all the same regardless of nearing the OCI. I do 5K OCI anyway which is what the manual says to do under extreme conditions which my car never faces. Normal conditions call for 9,300 mile OCI according to the manual.
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