Recent content by glxpassat

Thanks. I noticed they also sell a TVP77 that is a thicker viscosity and explicitly called out for rotary van pumps. I'm curious why they didn't recommend that one.

I just ended up using the Supercool oil from Advance Auto, I believe it is an iso 68. It seemed to work fine, my friend's ac blew very cold after I got it charged up. I don't use the pump often, if I did I would probably try to find an iso 100.

Thanks for the replies, everyone! I guess my biggest concern was the correct viscosity. I knew I could find vacuum oil at the local store, but most of it is thinner oil and I just didn't know if these old units used something thicker, like iso 100. An iso 100 vacuum specific oil is harder to...

I have an old Nelson model 911s belt-driven vacuum pump that I inherited from my Father. I seems to work fine but there's no telling how old the oil in it is. I saw one ad where they are capable of 10 microns. A comment on Youtube stated these old units used 30w compressor oil. The label...

Unless you want to do extended drains I would go with whatever is cheapest.

Thanks so much Molakule! By interchangeabiltiy, I mean, if my old Nissan truck specs a 75w-90 GL-4 and I put in a 70w-80 GL-4, am I creating a condition where more wear will occur. Or since they are both GL-4, should the same amount of wear occur reguardless of viscosity? Companies like Redline...

I'm intrigued by this. IE, if two fluids have GL-4 rating, but are much different viscosity, will they offer the same wear protection just at different cost and cold weather shift performance? Intuitively it seems making a 75w-90 GL-4 could cost much less (using lower grade fluid with fewer...

Super Tech Heavy Duty Tractor Hydraulic and Transmission Fluid now lists API GL-4 as a spec on the back of the bottle- link.

Before the low saps craze, VW 503.01 was the Audi high horsepower turbo spec oil. I believe that spec is still listed on some oil containers today like Castrol 0w-30 and Mobil 1 0w-40.

Haven't been on this site for a long time. I no longer have the '03 Passat V6 that I bought new, but this was the smoothest oil I ever tried in it. Bought a big stash and then sold off a lot of it to folks here. My engine just seemed more quiet and smooth at higher rpm's with this stuff. Here's...

Making the trigger lighter just means it will still fire when dropped, just from a greater height. So don't climb any ladders or trees.

From that Lubrizol site, VW 504 looks the most impressive to me.

Originally Posted By: BLKGTTDI What difference does the "A2" make (I think I've seen A1 also) Or does this imply that all VW G 052 171 regardless of A1 or A2 are all SAE 70W75 viscosity gear oil? I know this is an old post and I no longer own a VW, but from what I remember the A1 and A2...

My take, which is probably wrong, is that today the base oils are so good that it no longer requires a 90w oil to achieve the GL-4 rating. When GL-4 was blended with group 1 many years ago, 90w was probably needed. Back then a 75w-90 would shear down faster than today. I may try to call...

Originally Posted By: Oro_O So, does anyone have a place to get some reasonably priced GL-4 75w-90? I need quite a few quarts of it, and at $15/each it seems a bit pricey. Or is that just the going rate? I see Gl-5 for $5/quart, so the difference seems like a stiff premium. Valvoline...