Upon suggestion from a previous thread, I think I am going to try running some Kreen through my wife's Jeep since I don't really know the history of it, bought it at 142K now have 156K. I just think a good thorough cleaning is the way to go so I know what I have so to speak. I know there is sort of a love-hate thing about products like this, and I'm kind of in the middle. I agree/believe that if you properly maintain your engine, there is no need for this type of product and that a regular fuel system cleaner is all that is really needed. However, I also agree/believe that when you buy a used vehicle, you have NO idea how it was maintained prior to your ownership and that without tearing it apart and seeing for yourself, you have no idea if there are clogged oil gallies or large carbon deposits, etc. So with the Jeep, I just want to do what I can to make sure it is running to the best of it's ability.
I've done a bit of reading about the stuff here and other places found via google search and have found many people put it in the crankcase for anywhere from a couple hundred to 1000 miles, even read some say OCI. I seem to recall (maybe improperly) an old school method of draining oil completely, refilling with fuel oil and letting engine idle in the driveway for an hour to do the cleanse then drain and put new oil in. I assume this Kreen treatment does similar, I am unsure of running for an entire OCI, don't think I'd want those loosened particles flowing through the engine that long, but I could see maybe like 500 miles before an oil change.
I also found people saying to put it in the fuel tank to run through the fuel injectors and help dissolve carbon deposits in the combustion chamber. I've always seen this as a maintenance usage with other products more so than an actual cleanse.
What I haven't found was the classic Seafoam style usage for this Kreen stuff, where you pour it into a vacuum line (usually unhook from brake booster) so it is less diluted with fuel to soak into the buildup and break it loose. I was just wondering if this is less than stellar idea because of it potency over seafoam. I have found people knocking the idea of a full piston soak by pouring into spark plug hole due to risk of hydro-lock, which I would agree with as well, any performance you are trying to maximize by cleaning could be shot right down to zero performance in a hurry.
So, my questions in summary are:
1. Thoughts on length of time in crankcase?
2. Thoughts on pouring it in vacuum lines to coat the combustion chamber?
3. Thoughts on effectiveness of adding to fuel vs the vacuum lines?
Thank You in Advance,
Eric
I've done a bit of reading about the stuff here and other places found via google search and have found many people put it in the crankcase for anywhere from a couple hundred to 1000 miles, even read some say OCI. I seem to recall (maybe improperly) an old school method of draining oil completely, refilling with fuel oil and letting engine idle in the driveway for an hour to do the cleanse then drain and put new oil in. I assume this Kreen treatment does similar, I am unsure of running for an entire OCI, don't think I'd want those loosened particles flowing through the engine that long, but I could see maybe like 500 miles before an oil change.
I also found people saying to put it in the fuel tank to run through the fuel injectors and help dissolve carbon deposits in the combustion chamber. I've always seen this as a maintenance usage with other products more so than an actual cleanse.
What I haven't found was the classic Seafoam style usage for this Kreen stuff, where you pour it into a vacuum line (usually unhook from brake booster) so it is less diluted with fuel to soak into the buildup and break it loose. I was just wondering if this is less than stellar idea because of it potency over seafoam. I have found people knocking the idea of a full piston soak by pouring into spark plug hole due to risk of hydro-lock, which I would agree with as well, any performance you are trying to maximize by cleaning could be shot right down to zero performance in a hurry.
So, my questions in summary are:
1. Thoughts on length of time in crankcase?
2. Thoughts on pouring it in vacuum lines to coat the combustion chamber?
3. Thoughts on effectiveness of adding to fuel vs the vacuum lines?
Thank You in Advance,
Eric