Oil additives?
Thread Starter
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Senior User
Joined: Mar 2008
Posts: 210
Likes: 0
From: New Orleans, LA
Oil additives?
Does anyone use and oil additive like marvel etc.......to keep the sludge and contaminents down between changes?
Ive used marvel in the past just curious if people use it on their diesels.
Ive used marvel in the past just curious if people use it on their diesels.
Junior User
Joined: Jan 2012
Posts: 91
Likes: 0
From what I've read about oil additives is that none of them are very good....most have additives that the oil manufacturer had already put in it.
If you want to combat sludge, change your oil more frequently......I change mine every 3000 miles.
If you want to combat sludge, change your oil more frequently......I change mine every 3000 miles.
Cargo Master
Joined: May 2010
Posts: 3,047
Likes: 9
From: Snohomish, WA
Additives are not needed and should not be used with our engines (or any engine for that matter). I think if you use a quality oil and maintain it, you will be far better off than using some Snake Oil that claims to improve everything.
Change your oil and spend the money saved on additives on oil analysis. This will show you really how your oil is holding up.
Change your oil and spend the money saved on additives on oil analysis. This will show you really how your oil is holding up.
Thread Starter
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Senior User
Joined: Mar 2008
Posts: 210
Likes: 0
From: New Orleans, LA
yea i do change my regularly and have always used good oil, just dont know what you get when you buy a used vehicle. Just try and take out some of the "X" factor of the previous owner
Fleet Mechanic
Joined: Dec 2010
Posts: 1,546
Likes: 9
From: Wellington, Co
Given the nature of the high pressure oil system, I stick with good oil and good filters. Use Rotella T syn and just started using Donaldson ELF filter. I was doing 5k changes with a Motorcraft filter, but plan on sample at 5k and change at 10k.
For my "other" experience, '93 Honda Accord with 310k, nothing but 2500-3000 mile oil changes, never an additive.
For my "other" experience, '93 Honda Accord with 310k, nothing but 2500-3000 mile oil changes, never an additive.
Fleet Mechanic
Joined: Dec 2010
Posts: 1,546
Likes: 9
From: Wellington, Co
Given the nature of the high pressure oil system, I stick with good oil and good filters. Use Rotella T syn and just started using Donaldson ELF filter. I was doing 5k changes with a Motorcraft filter, but plan on sample at 5k and change at 10k.
For my "other" experience, '93 Honda Accord with 310k, nothing but 2500-3000 mile oil changes, never an additive.
Wierd, double post? Sorry.
For my "other" experience, '93 Honda Accord with 310k, nothing but 2500-3000 mile oil changes, never an additive.
Wierd, double post? Sorry.
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Laughing Gas
Joined: Sep 2003
Posts: 852
Likes: 12
From: Billings, MT
I wouldn't mess with any additives especially with a diesel (costly to replace). I use Rotella synthetic and that's it.
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Fleet Mechanic
Joined: Nov 2008
Posts: 1,573
Likes: 4
From: Seattle
Sludge and contaminants are minimized by the use of proper diesel rated motor oil and monitored oil change intervals. Of particular importance with our 7.3's since the injectors are powered by the same motor oil under high pressure. Additions of any oil additive could potentially create foaming and wreak havoc with the injectors.
Senior User
Joined: Jun 2009
Posts: 288
Likes: 0
From: Maryland
Never used any additives. No need to, all of your popular diesel oils have the needed additives blended in. Just make sure you use the proper rated diesel oil and a good oil filter ( I like the MC oil filter) and change the oil at the proper intervals.
9 ECHO 1
Joined: Aug 2009
Posts: 12,467
Likes: 58
From: Missouri
The only time I will put an additive in is if I have a problem, think I have a problem, or just want to for fun sake, but I will only do it 200-300 miles before I change my oil. That way I dont run with it for very long.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Pull your valve covers. That will tell you all you need to know. If the oil has been maintained properly, there won't be any sludge at all to worry about. If you have sludge, you've probably got injector problems and other issues as well.
Here's mine after about 250,000 miles.
It looked the same after 350,000 miles. No additives needed, no sludge found.
Here's mine after about 250,000 miles.
It looked the same after 350,000 miles. No additives needed, no sludge found.
Cargo Master
Joined: Jul 2011
Posts: 2,657
Likes: 967
From: Walpole, MA
Personally I don't run any additives...if you run good oil you really don't have any need for them.
Senior User
Joined: Mar 2011
Posts: 100
Likes: 0
I bought my truck used with 162K and was not overly impressed with the apparent maintenance it had received with the previous owner....some people don't like MMO or any additives for that matter and that is fine - I have no use for Lucas oil additives myself....but, I have witnessed benefits from MMOs use and know of no harm it has caused when used properly....as always, YMMV ...
