I am going to switch out the gear oil in my 09 Silverado Z71 with the G80 at 15k. I run Valvoline full synthetic in the engine...whats the story on Valvoline full synthetic gear oil? I have RP readily available but I have liked the Valvoline so far. Any personal experiences.
Valvoilne Synthetic Gear Oil?
- Thread starter bearinthewoods
- Start date
- Status
I run it in the diffies and X-fer case. It's pretty good stuff and doesn't shear a bunch like RP.
Lately I switched just the tranny to Amsoil Severe Gear for (I think) a little better cold shifting.
Prolly go with the SG all around next change.
Lately I switched just the tranny to Amsoil Severe Gear for (I think) a little better cold shifting.
Prolly go with the SG all around next change.
Originally Posted By: bearinthewoods
... I run Valvoline full synthetic in the engine...
That is NOT full synthetic oil. Only a hand full of oils in the North American Market are true synthetic.
... I run Valvoline full synthetic in the engine...
That is NOT full synthetic oil. Only a hand full of oils in the North American Market are true synthetic.
It is class III synthetic. Let's not open this debate again.
OP--I run 80w-90 Durablend in the rear differential in my Isuzu (since last summer) and so far it has been great.
OP--I run 80w-90 Durablend in the rear differential in my Isuzu (since last summer) and so far it has been great.
bear...I'm now running Valvoline 75W-140 synthetic in the daily driver in my sig below. The car hasn't been this quiet since we bought it 3 years ago. Also, it has FM already in it.
While we're on the subject, I'm about to change the gear oil in my Marquis (car is NON-limited slip). I was also considering between the 75w90 Valvoline SynPower and I'm also thinking about the Mobil 1 75w90. I'm looking for extended drain and better MPG. Does anyone have any suggestions between the two or would you recommend something else? Plus, how long could I go on it? Thanks again!
ALl Gear oils are extended drain. Any 75w-90 will be "synthetic" to achieve perfomance parameters. I would think a Shell gear oil based on the XHVI base would be a better carrier than a group III blend with tons of vii and PPDs.
Originally Posted By: Ursae_Majoris
It is class III synthetic. Let's not open this debate again.
OP--I run 80w-90 Durablend in the rear differential in my Isuzu (since last summer) and so far it has been great.
The OP seems like someone who needed a refresher on base stocks given the "full synthetic" fascination. You should never pay a full synthetic price for a Premium conventional oil improperly labeled as a synthetic.
It is class III synthetic. Let's not open this debate again.
OP--I run 80w-90 Durablend in the rear differential in my Isuzu (since last summer) and so far it has been great.
The OP seems like someone who needed a refresher on base stocks given the "full synthetic" fascination. You should never pay a full synthetic price for a Premium conventional oil improperly labeled as a synthetic.
Last edited:
Originally Posted By: ARCOgraphite
Originally Posted By: bearinthewoods
... I run Valvoline full synthetic in the engine...
That is NOT full synthetic oil. Only a hand full of oils in the North American Market are true synthetic.
I appreciate your info.
Originally Posted By: bearinthewoods
... I run Valvoline full synthetic in the engine...
That is NOT full synthetic oil. Only a hand full of oils in the North American Market are true synthetic.
I appreciate your info.
Originally Posted By: ARCOgraphite
Originally Posted By: Ursae_Majoris
It is class III synthetic. Let's not open this debate again.
OP--I run 80w-90 Durablend in the rear differential in my Isuzu (since last summer) and so far it has been great.
The OP seems like someone who needed a refresher on base stocks given the "full synthetic" fascination. You should never pay a full synthetic price for a Premium conventional oil improperly labeled as a synthetic.
Regardless it is not junk! I was being specific about what Valvoline oil I put in my truck even though its NOT "full" synthetic. BACK ON TOPIC.
Originally Posted By: Ursae_Majoris
It is class III synthetic. Let's not open this debate again.
OP--I run 80w-90 Durablend in the rear differential in my Isuzu (since last summer) and so far it has been great.
The OP seems like someone who needed a refresher on base stocks given the "full synthetic" fascination. You should never pay a full synthetic price for a Premium conventional oil improperly labeled as a synthetic.
Regardless it is not junk! I was being specific about what Valvoline oil I put in my truck even though its NOT "full" synthetic. BACK ON TOPIC.
I've been running Valvoline synthetic gear oil for years in my trucks, never any issues, run quiet. I have 75w140 in my 93 Silverado right now, but I do some towing.
Maybe I should look at the 140 instead of the 90...I tow a 20 foot car hauler loaded up with ATV's......
mercuryblues, either of the gear oils you mention will be fine. As far as getting better MPG, it'll be so small I doubt you'll notice anything.
As to how long it will last, in an open (non Trac-Lok) differential you should never NEED to change it again, unless you tow or the unit gets submerged.
As to how long it will last, in an open (non Trac-Lok) differential you should never NEED to change it again, unless you tow or the unit gets submerged.
Thanks! I appreciate it!
Didn't the Valvoline Gear Oils get slammed in that Amsoil whitepaper on gear oils. Them and Pennzoil atleast met requirements, and Lucas was just simply trash that didn't meet the specification requirements.
IIRC of course.
IIRC of course.
Many gear oils got slammed by the Amsoil whitepaper.
I enjoy company testing but usually draw my own conclusion depending on my own usage.
Synpower 75w90 did better than Mobil1, RoyalPurple, Mopar, GM and Torco gear oils in the 20hr KRL shear stability test. So, it should hold up when towing.
Synpower beat out Castrol Syntec, Redline, RoyalPurple and Lucas in the Brookfield Visc test. Great for those Ohio winters when you don't want the gear oil to turn into molasses. Also pour point was excellent.
And, the 4-ball weld-point and load wear index were excellent for Synpower.
Actually, when you look at Synpower in Amsoils white paper, its a gear oil that I would definitely recommend.
Since you tow a trailer, definitely step up the visc to a 75w140 gear oil to protect the 'end.
I enjoy company testing but usually draw my own conclusion depending on my own usage.
Synpower 75w90 did better than Mobil1, RoyalPurple, Mopar, GM and Torco gear oils in the 20hr KRL shear stability test. So, it should hold up when towing.
Synpower beat out Castrol Syntec, Redline, RoyalPurple and Lucas in the Brookfield Visc test. Great for those Ohio winters when you don't want the gear oil to turn into molasses. Also pour point was excellent.
And, the 4-ball weld-point and load wear index were excellent for Synpower.
Actually, when you look at Synpower in Amsoils white paper, its a gear oil that I would definitely recommend.
Since you tow a trailer, definitely step up the visc to a 75w140 gear oil to protect the 'end.
Originally Posted By: gamefoo21
Didn't the Valvoline Gear Oils get slammed in that Amsoil whitepaper on gear oils.
The Valvoline conventional 80W-90 held it's own against the other dinos, too bad the Durablend wasn't tested. I've put the Durablend 80W-90 in the differentials of my daughter's Subie Forester.
Didn't the Valvoline Gear Oils get slammed in that Amsoil whitepaper on gear oils.
The Valvoline conventional 80W-90 held it's own against the other dinos, too bad the Durablend wasn't tested. I've put the Durablend 80W-90 in the differentials of my daughter's Subie Forester.
Originally Posted By: unDummy
Many gear oils got slammed by the Amsoil whitepaper.
I enjoy company testing but usually draw my own conclusion depending on my own usage.
Synpower 75w90 did better than Mobil1, RoyalPurple, Mopar, GM and Torco gear oils in the 20hr KRL shear stability test. So, it should hold up when towing.
Synpower beat out Castrol Syntec, Redline, RoyalPurple and Lucas in the Brookfield Visc test. Great for those Ohio winters when you don't want the gear oil to turn into molasses. Also pour point was excellent.
And, the 4-ball weld-point and load wear index were excellent for Synpower.
Actually, when you look at Synpower in Amsoils white paper, its a gear oil that I would definitely recommend.
Since you tow a trailer, definitely step up the visc to a 75w140 gear oil to protect the 'end.
Does anyone have a link for said white paper??
Many gear oils got slammed by the Amsoil whitepaper.
I enjoy company testing but usually draw my own conclusion depending on my own usage.
Synpower 75w90 did better than Mobil1, RoyalPurple, Mopar, GM and Torco gear oils in the 20hr KRL shear stability test. So, it should hold up when towing.
Synpower beat out Castrol Syntec, Redline, RoyalPurple and Lucas in the Brookfield Visc test. Great for those Ohio winters when you don't want the gear oil to turn into molasses. Also pour point was excellent.
And, the 4-ball weld-point and load wear index were excellent for Synpower.
Actually, when you look at Synpower in Amsoils white paper, its a gear oil that I would definitely recommend.
Since you tow a trailer, definitely step up the visc to a 75w140 gear oil to protect the 'end.
Does anyone have a link for said white paper??
- Status