Conventional oils being phased out.

[135sohc]

Interested to hear what others have been using/concocting in our manual transmissions as 5w20 and 5w30 conventional flavor oils are being phased out.

I have tried everything over the years and still find myself coming back to plain old 5w30 as the best all around lubricant.

[going4speed]

When conventional goes away probably going to use lubriplate spo 233

[cordes]

I've gone to the O'Reily conventional that they still have. I really wish there was something designed specifically to work with the later 1/2 synchro AND the 3/4 and 5 synchros.

[Tonatom2]

I've gone to the O'Reily conventional that they still have. I really wish there was something designed specifically to work with the later 1/2 synchro AND the 3/4 and 5 synchros.

Is this in the trans? I put 5w30 Mobil high mileage in ours but was told that's likely not a good idea and should have went mobil 1000 but you can't get that stuff here in Canada.

[cordes]

Yes. I put that oil in the trans.

[Warren Stramer]

This is what you want, Works good.

[Tonatom2]

This is what you want, Works good.

Isn't that for nv4500 with carbon fibre synchro?

[135sohc]

When conventional goes away probably going to use lubriplate spo 233

I looked that up, sounds like good stuff but I wonder about the cold weather performance ?

This is what you want, Works good.

That stuff seems to have a love it or hate it following here. To hear you endorse it I will take that as a vote of confidence.

2 Pour point is less than -39°C. Low temperature viscosity in a -40°C Brookfield test of 50,000 cPs maximum, less than a 75W gear oil and the cold cranking viscosity less than a typical conventional SAE 5W engine oil.​​

That does answer my concerns/questions about low temperature usage.

[c2xejk]

I will second using Synchromesh. I have also used Redline MTL. The only reason I don't use it more is that it is not available locally... Royal Purple Synchromax is another option.

To be honest, I would not use 5w-30 motor oil in manual transmissions. Back when the recommendation was made the spec's lined up, since then motor oil formula has been tweaked for engines, not manual transmissions...

Simply put, I prefer to use a fluid designed for manual transmissions in a manual transmission...

[ajakeski]

Redline MTL.

[chromguy]

Redline MTL.

Jackson has said he has seen several MTX that Redline has killed...

[BadAssPerformance]

Jackson has said he has seen several MTX that Redline has killed...

I've seen several that look like MTL that have old ATF in them.


For manual trans:
Regular use - Redline MTL
Performance use/racing - Redline MT90

I've put thousands of miles on high mile trans with MTL without issues. Original A520 trans in my first CSX, no issues from 90k to 178k when I stopped DD it. My CSX Clone had the original A520 in it (over 100k mi when I got it) and then on MTL drove all over and made over 200+ passes leaving 5k RPM dead-hooking on slicks and low 13's or better before the teeth on 2nd gear fatigued

[Tonatom2]

I've seen several that look like MTL that have old ATF in them.


For manual trans:
Regular use - Redline MTL
Performance use/racing - Redline MT90

I've put thousands of miles on high mile trans with MTL without issues. Original A520 trans in my first CSX, no issues from 90k to 178k when I stopped DD it. My CSX Clone had the original A520 in it (over 100k mi when I got it) and then on MTL drove all over and made over 200+ passes leaving 5k RPM dead-hooking on slicks and low 13's or better before the teeth on 2nd gear fatigued

Now that's great info! But in Canada they want $120/gal...


After an amazon search all the synchromesh/ synchro max valvoline, pen, royal p, GM. All seem to be in the same price range. I know straight from GM the ac delco oil was $35/ qrt.