Hi,
I bought an Aeromotive fuel pressure gauge but it did not come with the fuel rail adapters so I ordered an nrg gauge that did come with the rail adapter.
The aeromotive one is dry where the nrg is liquid filled.
Is there a difference?
Which is better?
Thanks

 

There are claims that liquid filled gauges stop the needle from vibrating and make it easier to read and fine tune fuel pressure. I have a B&M gauge on my b16, it's not liquid filled and it does not vibrate what-so-ever. Maybe on certain applications or cheaper gauges the needle will vibrate but I'd just go with whatever gauge looks nicer...

 

x2...

if you already have both gauges, i would just use the liquid filled...but either should work fine.

 

Do I have to use threadlock or teflon?

 

i think the liquid(oily) is there to prevent corrosion of the internal mechanism....wild guess