Oil foaming

GLAMIS WEATHER
R

RevXproducts

New member
Joined
Jun 15, 2026
Messages
9
Reaction score
18
Oh yeah, About that foaming issue. What oil are you using in your engine that is causing a foaming issue? Why? Because where the foaming aspect may be allowable in things such as a differential or a manual transmission so everything is continuously lubricated from foam pressing against the spinning components, it is not a good thing inside of an engine. Foaming or more commonly known as aireration will kill engines in a quick hurry because it allows the film layer to be depleted and metal to metal contact to happen. Now, I assume (yeah we know what that means) you are having issues or have seen someone that has had issues with the foaming issue in very high rpm engines. The answer here is an easy one for me to explain, when the Rev X Racing Additive is added to the favorite blend (we all have our favorites you know) of engine oil it blends together to form the highest performance lubricant available. There is an anti foaming agent within the additive that helps to keep the foaming from happening, however, the main benefit that the product brings to the game is the fact that it creates a film layer that cannot be blown out under any situation (it remains even when no fresh oil replenishes it). The same resulting film layer is responsible for saving engines under brutal boost levels and massive nitrous hits. Nothing has ever been able to protect your engine better at high rpms when the sump runs dry (ZERO oil pres) and is waiting for the oil that has been pumped somewhere else and is waiting for it to return to the pan to be recirculated again. It is simply the best insurance policy you can have to guard against lubrication related failures! I know i rambled on but a good question needs a correct answer. DW
 

Attachments

  • RAC0501BX.jpg
    RAC0501BX.jpg
    1.4 MB · Views: 1
Thanks @RevXproducts
So my issue isn't with a offroad, it's boats either way it's relative to your oils/additives.

Engine oil in a 454 Big Block Chevy Jet Boat

Issue: Oil pressure drop / foaming or starvation at constant 4500-5800 rpm for say 5/6 1/4 mile passes. Engine revs up we run some hard passes, cooler kicks in and hold temp steady, but.... oil pressure starts to drop from constant 70-80+ to 40psi during the run and we stop making passes due to oil pressure.

Previously we had a oil temperature issue and cooked two engines but the oil pressure issue was still present.
Fix the oil temp issue (now it's too cold honestly) it's thermostat regulated to the cooler at 185deg.

So now with that said...
I use VR1 15/40 conventional, 8.5-9qts in a 10qt pan. Any other oil type I've tried instantly bad either heat and drop pressure or won't hold up to normal VR1 conditions. I've tried GTX, diesel delo/T6 and a couple of others in different weights and none worked out. Went home and went back to VR1.
Over 9qts and it does the same thing at all RPMs, drops oil pressure likely aeration from crank.
5-6 1/4 mile hot passes, same aeration or lack of oil in pan, unknown pressure drops

I like your explanation of the film situation, saving parts in a no oil or aerated oil situation. I'd be willing to try an additive just to have a safeguard.
I considered going to Driven Oil this year just to see if it helped. Watching youtubes of steve morris and the oil geek a lot this year.
 
You might not be draining oil back to the pan fast enough. It's all sitting in the top of the engine, starving the pump. It takes a while for the air to escape the oil.
 
Can you change the oil pan?

Something with wings or deeper sump or better windage tray/cran scraper?

Maybe a dry sump??
 
lets try to keep this on point with the RevX oils and additive properties, and keeping a engine alive when $hit hits the fan, or at least keeping it from being catastrophic failure

so my question is/would the RevX additive help in reducing any of the aeration, and I think the answer is sort of by adding a protective film coating between surfaces, not directly reducing aeration

but..
Kraut, yes that is one potential issue. My engine builder is suggesting a change in the galley plugs (open flow to heads) to a galley restrictor (50-60% reduction to heads)
bobalos, no/yes the pan is already jet boat specific with windage tray etc... dry sump sure just $$$$ and over complicated for a river runner
 
Dune-Track-N said:
lets try to keep this on point with the RevX oils and additive properties, and keeping a engine alive when $hit hits the fan, or at least keeping it from being catastrophic failure

so my question is/would the RevX additive help in reducing any of the aeration, and I think the answer is sort of by adding a protective film coating between surfaces, not directly reducing aeration

but..
Kraut, yes that is one potential issue. My engine builder is suggesting a change in the galley plugs (open flow to heads) to a galley restrictor (50-60% reduction to heads)
bobalos, no/yes the pan is already jet boat specific with windage tray etc... dry sump sure just $$$$ and over complicated for a river runner
Click to expand...
This an Olds 455 by chance?
 
Dune-Track-N said:
Thanks @RevXproducts
So my issue isn't with a offroad, it's boats either way it's relative to your oils/additives.

Engine oil in a 454 Big Block Chevy Jet Boat

Issue: Oil pressure drop / foaming or starvation at constant 4500-5800 rpm for say 5/6 1/4 mile passes. Engine revs up we run some hard passes, cooler kicks in and hold temp steady, but.... oil pressure starts to drop from constant 70-80+ to 40psi during the run and we stop making passes due to oil pressure.

Previously we had a oil temperature issue and cooked two engines but the oil pressure issue was still present.
Fix the oil temp issue (now it's too cold honestly) it's thermostat regulated to the cooler at 185deg.

So now with that said...
I use VR1 15/40 conventional, 8.5-9qts in a 10qt pan. Any other oil type I've tried instantly bad either heat and drop pressure or won't hold up to normal VR1 conditions. I've tried GTX, diesel delo/T6 and a couple of others in different weights and none worked out. Went home and went back to VR1.
Over 9qts and it does the same thing at all RPMs, drops oil pressure likely aeration from crank.
5-6 1/4 mile hot passes, same aeration or lack of oil in pan, unknown pressure drops

I like your explanation of the film situation, saving parts in a no oil or aerated oil situation. I'd be willing to try an additive just to have a safeguard.
I considered going to Driven Oil this year just to see if it helped. Watching youtubes of steve morris and the oil geek a lot this year.
Click to expand...
OH BOY! I've been building engines for forty years and can tell you for a fact that you do not have an aireration problem, you're running out of oil. Jet boat engines are a different breed compared to the drag race engines. The constant rpm of direct drive has no forgiveness ( even my V-drive has a two speed auto that drops the rpms). You need restrictors in it for continued high rpm use or where does the oil go? To the top end. Where does the oil pressure go when that happens? To never never land! You should really be using a dry sump system for this application or a lot bigger oil pan and the restrictors. Even with setting up the sump at a 1/4" -1/2" above the pan, you simply do not have enough oil draining back into the pan to keep that badass motor lubed. The Rev X Racing Additive is the only product that will keep your motor from scrapping itself when you loose oil pressure, period. We have developed this product for all of you guys that want to run on the ragged edge of performance to keep things running the way they should and do it without failures of any kind. DW
 
You must log in or register to reply here.
Back
Top