Recent content by glxpassat

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...

Got it, thanks Molakule!

Just curious, but since a gl-4 has half the ep additive of a gl-5, couldn't a 1:1 mixture of gl-5 gear oil and diesel engine oil of the same weight be mixed to create a gl-4?

The 1.8T's were originally on 10k oci's, and along with a low sump capacity, many were using non synthetic oil.

Originally Posted By: edyvw Originally Posted By: glxpassat I think there's only one reason for this - money, as they're probably more profitable losing some customers driving older BMW's and using the newer base oil. Had BMW continued to use it at the dealers and as factory fill, I'm sure it...