What's new
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.

Diesel in a gas motor?

noJeepshere

noJeepshere

I Drove Trains!
GMOTM Winner
Joined
Jan 2, 2003
Posts
10,555
Reaction score
5,388
Location
Layton, UT
A guy I was talking to last night said that putting diesel into a gas motor, in somewhat small amounts, is good for the engine. Said it cleans the injectors and some gunk in the lines, etc. Is he nuts, or is there validity in his statement? I know gas motors take more kindly to diesel then vice versa (Kaboom!), so just wanted get some input on this. Thanks.
 
noJeepshere said:
A guy I was talking to last night said that putting diesel into a gas motor, in somewhat small amounts, is good for the engine. Said it cleans the injectors and some gunk in the lines, etc. Is he nuts, or is there validity in his statement? I know gas motors take more kindly to diesel then vice versa (Kaboom!), so just wanted get some input on this. Thanks.
Click to expand...

I've heard of all sorts of stuff I wouldn't dare try...

1) Transmission fluid mixed with gasoline to run through the engine...supposedly it does much of the same thing because of all the detergents in it. Supposed to smoke like crazy, but clean out the fuel system and combustion chambers. Apparently it's an old-school version of using Sea Foam.

I wouldn't try it.

2) Another was draining half the oil, then topping off the oil level with kerosene for a 50/50 mix of Kero and Oil. Then run the car at idle for a while. Let it get to full operating temp and then run for a good while longer, (I think occasionally revving the engine). Supposed to remove old, caked/baked on oil from the internals. Drain, replace filter, refill with oil. I was told it'd smoke for a few hundred miles afterward, but the inside of the engine would look new.

I wouldn't try it.
 
jonrpick said:
I've heard of all sorts of stuff I wouldn't dare try...

1) Transmission fluid mixed with gasoline to run through the engine...supposedly it does much of the same thing because of all the detergents in it. Supposed to smoke like crazy, but clean out the fuel system and combustion chambers. Apparently it's an old-school version of using Sea Foam.

I wouldn't try it.






2) Another was draining half the oil, then topping off the oil level with kerosene for a 50/50 mix of Kero and Oil. Then run the car at idle for a while. Let it get to full operating temp and then run for a good while longer, (I think occasionally revving the engine). Supposed to remove old, caked/baked on oil from the internals. Drain, replace filter, refill with oil. I was told it'd smoke for a few hundred miles afterward, but the inside of the engine would look new.

I wouldn't try it.
Click to expand...


My old neighbor told me about that one as well, he then one day called me to say he was going to do this on his 80 Chevy 1/2 ton and to stop down if I wanted to check it out. So not only did I get to see someone do this but I also got to witness him wiping most of the bearings in the bottom end that day as well:doah:
 
noJeepshere said:
A guy I was talking to last night said that putting diesel into a gas motor, in somewhat small amounts, is good for the engine. Said it cleans the injectors and some gunk in the lines, etc. Is he nuts, or is there validity in his statement? I know gas motors take more kindly to diesel then vice versa (Kaboom!), so just wanted get some input on this. Thanks.
Click to expand...

Pay a pro to clean your injectors, or don't do it at all. Injectors are not all the same, and without hearing from an injector rebuilder on the topic, I wouldn't want to chance it. Some solvents ("injector cleaners") are actually corrosive to some of the injectors out there. Diesel and ATF are sometimes talked about for putting in the oil as well, apparently due to the detergent properties.
 
been doing the sub 1 qt of motor oil for 1 qt of atf and run 1k miles and change again. you wouldnt belive the crap that comes out after that. and the motor sounds better now .

old time mechanic told me this years ago. i live this trick and use it alot.
 
sweetk30 said:
been doing the sub 1 qt of motor oil for 1 qt of atf and run 1k miles and change again. you wouldnt belive the crap that comes out after that. and the motor sounds better now .

old time mechanic told me this years ago. i live this trick and use it alot.
Click to expand...


I heard that too, from and old time Mechanic, and gave it a try. I agree works great. As far as a little diesel mixed in with the gas. It works as well in small amounts. The oil in the diesel helps lubricate your valves, of coarse you can always use marvel mystery oil and get the same effect. It works good on motors that are getting warn and take a little for the oil to pump to the valves. By having the lubricity in the fuel they always have a little lubricant.
 
sweetk30 said:
been doing the sub 1 qt of motor oil for 1 qt of atf and run 1k miles and change again. you wouldnt belive the crap that comes out after that. and the motor sounds better now .

old time mechanic told me this years ago. i live this trick and use it alot.
Click to expand...

I've heard of this. What about Lucas Oil Stabilizer?
 
Why not just switch to synthetic???

It works.

I switched to Mobil 1 in the 305 that I originally had in my K5. When I swapped in the 350, the mechanic pulled the valve covers on the 305. He said he hadn't seen an engine that clean with that many miles on it in his life.
 
jonrpick said:
Why not just switch to synthetic???

It works.

I switched to Mobil 1 in the 305 that I originally had in my K5. When I swapped in the 350, the mechanic pulled the valve covers on the 305. He said he hadn't seen an engine that clean with that many miles on it in his life.
Click to expand...
I'm already doing that. My grandpa, who bought the truck new, was uber-particular about it and right away put Mobil-1 synthetics in everything. My brother who got it next, did the same, but I'm too cheep to put Mobil-1 in it, but I keep a synthetic oil it.

This guy was talking putting 1 gallon diesel for every 10 gallons of gas.
 
i've heard about the 'gallon of diesel' in a gas tank, but i heard it was one gallon diesel to 15/20 gas... different strokes i guess... i work at an oil change place and we sell an upper engine cleaner, which is dripped slowly into a vacuum line, and it cleans the crap off the heads... i want to try it on my truck to see if it's worth it... the few i did at work, you empty the bottle (takes like 15 mins) then rev it a couple times and you can see the garbage fly out the tailpipe...

we also have a Wynn's engine cleaner that basically smells like lacquer thinner, but is oily, and you drain the oil, change the filter and run the cleaner... drainj, replace the filter, and add new oil... the new oil down in the pan still looks brand new after the motor runs for our 'safety check'...

i run quaker state 10/30 full sunthetic 'Q-torque' because it's only $20 for the gallon... i run that and a quart of Lucas...
 
GalDemSuga said:
I've heard of this. What about Lucas Oil Stabilizer?
Click to expand...

They ought to change the name to "lucas oil thickener".

you might find the attachments interesting. It's a breakdown of the Lucas stuff, done by one of the larger oil company labs. I'm not a fan of mobil1, but their conclusions are worth reading before you buy the stuff.

Lucas Heavy Duty Oil Stabilizer1.jpg

Lucas Heavy Duty Oil Stabilizer 2.jpg
 
dyeager535 said:
There a link to that online? :)
Click to expand...

I found it back in 2004..not sure if it's still up anyplace or not.. just thought I'd share something from my "collection"..

Their conclusions about what happens to the product under heat, and how it affects viscosity fall right in line with other research I've looked into regarding PIB, brightstock, and common oil additives in general, so I never felt a need to question the paper itself..
 
Damn, I'm running Lucas in just about everything I have. I'm running a quart in my tranny, a quart in my tcase and a quart in my engine oil. I ran it for years even when I was back in high school. Sold my 86 k5 4 yrs ago with 370k on the orig motor and it's actually still running great today. I've been putting a quart of lucas in my 96 s10 blazer for many many years and it's got 390k on the orig motor and it's still running strong. Maybe these engines would have lasted this long without it, maybe not, but I'm gonna keep on using it personally.

That report is kind of disheartening though
 
4by4bygod said:
They ought to change the name to "lucas oil thickener".

you might find the attachments interesting. It's a breakdown of the Lucas stuff, done by one of the larger oil company labs. I'm not a fan of mobil1, but their conclusions are worth reading before you buy the stuff.
Click to expand...

Whats wrong with mobil 1? Yeah it's pricey but worth it. I've seen full blown race teams go down to kragen and buy the stuff right off the shelf.

60 bucks for 5 quarts and mobil 1 filter...
 
Fabrimacator21 said:
Whats wrong with mobil 1? Yeah it's pricey but worth it. I've seen full blown race teams go down to kragen and buy the stuff right off the shelf.

60 bucks for 5 quarts and mobil 1 filter...
Click to expand...

Nothing "wrong" with it - it's just that the oil aisle at the auto parts store is like the bread aisle at the supermarket.. different brands, different labels, essentially the same ingredients.
 
4by4bygod said:
I found it back in 2004..not sure if it's still up anyplace or not.. just thought I'd share something from my "collection"..

Their conclusions about what happens to the product under heat, and how it affects viscosity fall right in line with other research I've looked into regarding PIB, brightstock, and common oil additives in general, so I never felt a need to question the paper itself..
Click to expand...

Oh no, I wasn't questioning the paper, was just hoping to get a link so I could send it to others. You know, some people just need to be linked direct. :)
 
carpeonnel said:
Damn, I'm running Lucas in just about everything I have. I'm running a quart in my tranny, a quart in my tcase and a quart in my engine oil. I ran it for years even when I was back in high school. Sold my 86 k5 4 yrs ago with 370k on the orig motor and it's actually still running great today. I've been putting a quart of lucas in my 96 s10 blazer for many many years and it's got 390k on the orig motor and it's still running strong. Maybe these engines would have lasted this long without it, maybe not, but I'm gonna keep on using it personally.

That report is kind of disheartening though
Click to expand...

I just pulled out my original motor with 200000 miles on her and she still ran even thought she leaked like crazy. I was running the Lucas in that one. Now I've installed a rebuilt motor and sure enough I have Lucas and Castrol Synthetic in that one.

I just changed the oil and added the Lucas, now I will warm her up and change the oil again.
 
You must log in or register to reply here.

Latest Posts

Top Bottom