Vp fuel cool down - Dodge Cummins Diesel Forum
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post #1 of 39 (permalink) Old 06-09-2019, 12:00 AM Thread Starter
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Vp fuel cool down

Today at the auto parts store I saw a bottle vp fuel cool down it says it runs up to 30 cooler and reduces cylinder head temp up to 75 f has anyone used this product does it help and at all


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post #2 of 39 (permalink) Old 06-09-2019, 01:14 AM
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Sounds like snake oil.

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post #3 of 39 (permalink) Old 06-09-2019, 01:31 AM
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I'm thinking snake oil also (where did that phrase come from?) Do an internet search and see if you can find data to back the claim....

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post #4 of 39 (permalink) Old 06-09-2019, 02:38 AM
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All that stuff does is break the surface tension of the water/coolant so that it adheres to the metal of the engine better and "possibly" removes more heat along those surfaces. It can work but its not a sure thing. Actually it was required in the older Powerstroke diesels because they had a problem where the spike of compression would cause the cylinder walls to cavitate where there was air pockets of coolant. Eventually boring a hole in the cylinder wall.

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post #5 of 39 (permalink) Old 06-09-2019, 10:23 AM
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Fleetguard makes an additive to prevent cavitation damage, but it is for diesels that have liners, like the 7.3 powerstroke and large OTR diesel engines. Our block is a parent block and does not need the additive. https://puredieselpower.com/products...-1-gallon.html

That said, I doubt the VP additive is in the same category. I spent a few minutes looking and only found one review, and it was for a snowmobile engine. Obviously not a diesel engine with cylinder liners. It was a good review though. In fact, I'm going to buy a couple bottles and see if my engine runs cooler while hauling my RV. Even with my expensive 4 row radiator I'm still getting up to 200-210 while climbing steep hills.

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post #6 of 39 (permalink) Old 06-09-2019, 01:17 PM
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Water wetters do work to a certain extent but 75* drop is a bit dramatic.

Not sure how it will run 30* since it has a thermostat. More questions, less answers

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post #7 of 39 (permalink) Old 06-09-2019, 08:33 PM
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I'm set up to be the test dummy, I bought two bottles today. I disconnected the overflow bottle when we stopped for the day so the radiator should have space in the morning. Here are my test numbers. It was 65f at the bottom of the Wasatch, U.S. 6 east bound, 60f at the top of Soldiers Summit. Truck + trailer is a bit over 18,000 lbs. I climbed the steepest grades with 20 psi of boost, 900 EGT, 2100 rpm, 50 mph in 5th gear. The clutch fan came on when the gauge hit 190. Max coolant temp was (guessing) 210. Tomorrow or the next day I'll be crossing the southern end of the Rockies in northern NM. I'm confident the outside temps will be warmer. More to come.
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post #8 of 39 (permalink) Old 06-10-2019, 11:12 PM
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I'll start with the disclaimer. This is in no way a scientific comparison of using it or not. Although the rpm, speed, gear and EGTs are the same there are differences. I could have backtracked and driven the same road, didn't happen. I should have had a control vehicle..nope. The differences are the steepness and length of the grades, the outside temp (8 degrees higher) and the humidity (drier). Add to that I only had two bottles, it was all they had at the store. With my cooling system I should have had three. However, I did see an improvement in top temps and rate of cool down when descending the backsides of the hills. It wasn't nearly as easy to exceed 190 and the fan clutch didn't stay on as long. When I get home the plan is to test the radiator cap and the t-stat for proper operation. I do plan to buy the third bottle of additive. IMO, the stuff does work, just not as well as the advertising says it does.
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post #9 of 39 (permalink) Old 06-11-2019, 01:06 AM
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If its good enough for GAmes.....then its gotta be legit.

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post #10 of 39 (permalink) Old 06-11-2019, 08:15 AM
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Quote:
Originally Posted by KATOOM View Post
If its good enough for GAmes.....then its gotta be legit.
I am not convinced, Gary or no

60-68 degrees is not hot enough for a good test. As far as the back side of the hill cool down, that is not an issue anyway. Too many variables in the terrain, ya need the same hill, back to back.
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post #11 of 39 (permalink) Old 06-11-2019, 09:51 AM
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That's OK Nick, I'm not selling or promoting. I'll be in the TX panhandle today, but even though the temps will be higher there isn't many hills to really exercise the stuff. Doing 60 mph on I40, 80f, AC on the temp was lower than normal as well. More like where they would be if the AC was off.
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post #12 of 39 (permalink) Old 06-11-2019, 10:12 AM
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I had similar results with Redline's water wetter back in the day on a couple of warmed over small blocks.

I did find a black scum lining the insides of the coolant overflow bottle though, and it wasn't oil.

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