BelRay Filter Oil

Marty1028
Posts
949
Joined
10/5/2017
Location
Lafayette, IN US

Am I losing my mind? Or did something change with the formula of their filter oil? Bought a new bottle, and it seems more runny than what I bought last year. Way more runny. It’s dripping out the bottom of my air box and on the floor of my garage. Anyone else having this problem? Or am I just going too nuts on oil?

|
rdbs505
Posts
122
Joined
7/20/2019
Location
Conroe, TX US
6/14/2026 6:07am
Marty1028 wrote:
Am I losing my mind? Or did something change with the formula of their filter oil? Bought a new bottle, and it seems more runny than...

Am I losing my mind? Or did something change with the formula of their filter oil? Bought a new bottle, and it seems more runny than what I bought last year. Way more runny. It’s dripping out the bottom of my air box and on the floor of my garage. Anyone else having this problem? Or am I just going too nuts on oil?

Can't speak to the belray but I switched from notoil to fft because it was doing the same thing. Super annoying. Fft seems thinner than notoil but haven't had any issues. Does it seem like it takes more to get the same coverage? 

Marty1028
Posts
949
Joined
10/5/2017
Location
Lafayette, IN US
6/14/2026 6:23am
Marty1028 wrote:
Am I losing my mind? Or did something change with the formula of their filter oil? Bought a new bottle, and it seems more runny than...

Am I losing my mind? Or did something change with the formula of their filter oil? Bought a new bottle, and it seems more runny than what I bought last year. Way more runny. It’s dripping out the bottom of my air box and on the floor of my garage. Anyone else having this problem? Or am I just going too nuts on oil?

rdbs505 wrote:
Can't speak to the belray but I switched from notoil to fft because it was doing the same thing. Super annoying. Fft seems thinner than notoil...

Can't speak to the belray but I switched from notoil to fft because it was doing the same thing. Super annoying. Fft seems thinner than notoil but haven't had any issues. Does it seem like it takes more to get the same coverage? 

It seems like it takes less because it’s going though the filter easier. 

Crutcher
Posts
260
Joined
1/12/2023
Location
Lawrence, KS US
6/14/2026 6:24am

Is there a chance your filter still had cleaning solution in it? 

Last time I used the pour on Bel Ray filter oil it was THICK. 

8
JMCR250
Posts
427
Joined
8/26/2018
Location
Chesterfield, MO US
6/14/2026 6:26am

Funny, the last two bottles of Bel Ray have seemed thicker than usual to me, and harder to work into the filter.  Maybe they're tinkering with viscosity and have now overshot the mark?

1

The Shop

ThePizzaCobra
Posts
728
Joined
12/1/2018
Location
The Garden State, NJ US
6/14/2026 6:54am

I’ve been using it for years, and a recent bottle is just as thicc as it’s always been, especially when the garage is cold. I honestly wouldn’t mind if they thinned it out a bit. Like Crutcher said, if you don’t rinse the cleaning solution out (with Dawn soap and water), that could make it runny. 

3
TK40_FC
Posts
632
Joined
5/17/2021
Location
Canton, OH US
6/14/2026 7:28am

I used this because my normal stuff was out of stock and while I didn't have trouble applying it, cleaning it out was a disaster. It turned into this thick white paste that just made a huge mess. My rinse water was full of it, and it would never seem to completely wash out.. 

Maybe its just use error,  but compared to how easy the maxima oil cleans up, the rest of the Belray bottle will just sit on the shelf. 

Marty1028
Posts
949
Joined
10/5/2017
Location
Lafayette, IN US
6/14/2026 7:42am
Crutcher wrote:

Is there a chance your filter still had cleaning solution in it? 

Last time I used the pour on Bel Ray filter oil it was THICK. 

No, it’s pretty runny out of the bottle. Usually, I’m used to this stuff having the viscosity of ketchup. That’s what I thought too, I usually dunk the filter in mineral spirits, wring it out, then continue washing it in hot soapy water then let it air dry for 24-48 hours before reinstalling. It’s still sticky as hell though

Nairb#70
Posts
3885
Joined
2/25/2020
Location
Ivoryton, CT US
6/14/2026 7:44am Edited Date/Time 6/14/2026 7:45am

Always thought that stuff was like tar, opted for Maxima FFT instead. You mave have gotten some from a batch that wasn't mixed properly and missed QC.

1
Dave v3.0
Posts
684
Joined
7/15/2022
Location
Ozark, AL US
6/14/2026 9:17am

If it's too thick you can cut it with mineral spirits to thin it out.  If it's too thin, you can thicken it up by exposing it to air for a while to let the carrying agent (once again mineral spirits) dry out a bit.  I keep mine in one of the Twin Air tubs and have to play this game from time to time.

250 cross
Posts
278
Joined
10/30/2020
Location
Belding, MI US
6/14/2026 10:13am

I've used it for years and it seems the same to me!

captmoto
Posts
5866
Joined
4/22/2009
Location
Rancho Cucamonga, CA US
6/14/2026 10:16am
TK40_FC wrote:
I used this because my normal stuff was out of stock and while I didn't have trouble applying it, cleaning it out was a disaster. It...

I used this because my normal stuff was out of stock and while I didn't have trouble applying it, cleaning it out was a disaster. It turned into this thick white paste that just made a huge mess. My rinse water was full of it, and it would never seem to completely wash out.. 

Maybe its just use error,  but compared to how easy the maxima oil cleans up, the rest of the Belray bottle will just sit on the shelf. 

Wat are you cleaning your filter with to start? I use kerosene or mineral spirits first, squeeze out as much as I can and then hot water and Dawn. My FFT cleans out about 98%. The filter stays just a tiny bit oily feeling. I've used both FFT and Maxima off and on and FFT the most. They both seem to work and clean the same for me.

1
eeazye
Posts
323
Joined
10/22/2009
Location
Akron, OH US
6/14/2026 10:31am
TK40_FC wrote:
I used this because my normal stuff was out of stock and while I didn't have trouble applying it, cleaning it out was a disaster. It...

I used this because my normal stuff was out of stock and while I didn't have trouble applying it, cleaning it out was a disaster. It turned into this thick white paste that just made a huge mess. My rinse water was full of it, and it would never seem to completely wash out.. 

Maybe its just use error,  but compared to how easy the maxima oil cleans up, the rest of the Belray bottle will just sit on the shelf. 

I’ve had that happen with the “biodegradable” filter oil. Think maybe it was No-Toil? If it is that oil you have to use their specific cleaner or you’ll get that gloppy pasty mess. 

6/14/2026 10:51am

My filter oil jug is a cocktail of various oils that go into the same container and gets topped off once in a while. Bel ray, for me at least, is now and has always been thick as molasses and hard to spread. FFT is always a little too thin to trust in the desert. So I buy FFT when the cocktail feels a little too sludgy and bel ray when it’s too thin. Various other oils have made their way in there. It’s entirely unscientific and based on whims and superstition. 

 

4
TK40_FC
Posts
632
Joined
5/17/2021
Location
Canton, OH US
6/14/2026 12:36pm
captmoto wrote:
Wat are you cleaning your filter with to start? I use kerosene or mineral spirits first, squeeze out as much as I can and then hot...

Wat are you cleaning your filter with to start? I use kerosene or mineral spirits first, squeeze out as much as I can and then hot water and Dawn. My FFT cleans out about 98%. The filter stays just a tiny bit oily feeling. I've used both FFT and Maxima off and on and FFT the most. They both seem to work and clean the same for me.

Used a mineral spirit substitute that I picked up, biodegradable like @eeazye  mentioned.  Might be a similar catalyst for the bad reaction to the filter oil. I hate how strong the odor is on the maxima cleaning agent, but it works really well, so just sticking to that from now on. 

6/14/2026 12:58pm

Bel Ray quality control has never been the best, we would get a case in and it was like water and the next case may be like syrup but it always works. 

 

1
1
lumpy790
Posts
11435
Joined
9/18/2007
Location
York, SC US
6/14/2026 3:35pm

I always keen my BelRay filter oil in a sealed spackle bucket with a little splash of gas to thin it out a little 

6/14/2026 10:53pm

Filer cleaner wring out 

Filter cleaner ring out 

Soap and water 


Or alternate ? 

I can never get bel ray filters truly clean - if I squeeze em there’s always this blueish grey left over sludge . 

Guess that’s why it stops dirt so well

EAmato88
Posts
595
Joined
1/23/2019
Location
Egg Harbor City, NJ US
6/15/2026 4:32am Edited Date/Time 6/15/2026 4:32am

Bel Ray foam oil user for 20+ years. Its the only foam filter oil I trust my engines with. I havent had any noticeable inconsistencies, always thick. I have known people who used to much or did not let cleaning solution completely dry and ended up with it running out of the air box.

2
EAmato88
Posts
595
Joined
1/23/2019
Location
Egg Harbor City, NJ US
6/15/2026 4:38am
Filer cleaner wring out Filter cleaner ring out Soap and water Or alternate ? I can never get bel ray filters truly clean - if I squeeze em there’s always...

Filer cleaner wring out 

Filter cleaner ring out 

Soap and water 


Or alternate ? 

I can never get bel ray filters truly clean - if I squeeze em there’s always this blueish grey left over sludge . 

Guess that’s why it stops dirt so well

Use clear mineral spirits to clean your filters. I put 3 gallons in a 5 gallon bucket and it lasts about a year, and thats cleaning 3-5 filters a week on average. I rinse and ring until clean, and just let them dry for a few days in the shop. No soap and water needed. Bel Ray will stain the filters a light blue but you can always still see when they are clean. I always put the filter face down in the cleaning bucket and rotate back and forth like a washing machine to knock the heavy stuff off and let it fall to the bottom

1
lumpy790
Posts
11435
Joined
9/18/2007
Location
York, SC US
6/15/2026 6:11am Edited Date/Time 6/15/2026 6:14am

I also have a spackle bucket with diesel in it to get the BelRay out and most of the dirt settles to the bottom before washing the filter with Palmolive dish soap latherted up and rinsed a couple times. That gets all the dirt out.

JMCR250
Posts
427
Joined
8/26/2018
Location
Chesterfield, MO US
6/15/2026 9:22am

I had been using Maxima spray filter cleaner, which usually did a good job, followed by soap and water washing.  Recently, RMATV was out of Maxima cleaner so I tried the Bel-Ray spray cleaner, and it seems to actually work a little better with less chemical residue smell.  I think I'll stick with it for now.

Gravel
Posts
1846
Joined
2/22/2014
Location
Ridgecrest, CA US
6/15/2026 9:38am

I let the filter sit and dry for a day before installing it, otherwise either FFT or BelRay drains off and makes a sticky mess. 

The solvents have changed a lot, the new stuff isn’t nearly as fast drying and consistent.

6/15/2026 8:20pm

I noticed about 3-4 years ago it went from a purplish blue syrup like consistency to more of a thicker formula with more blue tint. 

Right around the time they changed the bottle design. 

1
disbanded
Posts
6921
Joined
8/26/2007
Location
Evergreen, CO US
6/15/2026 8:33pm
Crutcher wrote:

Is there a chance your filter still had cleaning solution in it? 

Last time I used the pour on Bel Ray filter oil it was THICK. 

 I like my women like I like my Bel Ray filter oil 

1
6/15/2026 11:01pm

The bell ray oil have been thick as f when I have used it. 

I thought bell ray was to thick and twin air was to thin so I usually mix them and it works really good.

FGR01
Posts
6093
Joined
10/1/2006
Location
AZ US
Fantasy
6/16/2026 12:58am
M59 Front wrote:
I noticed about 3-4 years ago it went from a purplish blue syrup like consistency to more of a thicker formula with more blue tint. Right around...

I noticed about 3-4 years ago it went from a purplish blue syrup like consistency to more of a thicker formula with more blue tint. 

Right around the time they changed the bottle design. 

Bel Ray was bought out by Calumet around that time.  They were actually helping customers out that got the super thick batches.  A Vital member was an employee there and was assisting folks.  Old thread is probably still around.     

CPR
Posts
6865
Joined
10/4/2018
Location
AU
6/16/2026 2:38am

Letting the filter dry completely after washing, and after oiling, is the ticket. 
BelRay has always been my go to.

1
Fireblade2k
Posts
82
Joined
10/31/2019
Location
Saint Petersburg, FL US
6/16/2026 8:39pm

I have a bottle that's less viscous than in the past too. Hope it's safe to use.

Falcon
Posts
12383
Joined
11/16/2011
Location
Menifee, CA US
6/19/2026 3:58pm
Crutcher wrote:

Is there a chance your filter still had cleaning solution in it? 

Last time I used the pour on Bel Ray filter oil it was THICK. 

disbanded wrote:

 I like my women like I like my Bel Ray filter oil 

 

DC
Thick and sticky on my fingers!!

Post a reply to: BelRay Filter Oil

The Latest