Alright, I'm sure this might strike up some controversy, but I have to say it. I don't see why it's said that 10w30 is obsolete. Yes, I understand that no current American Auto manufacturer is specifying or recommending it, and yes I know that in colder regions 0W and 5W oils deliver better cold start up and flow better in cold temps. I think it's rather arrogant to call it obsolete though. It is still very common for people in my region (central Alabama) to use it where it's recommended. I haven't seen any indication that it's of lower quality either, as most brands are still updating their conventional 10w30 (and 10W40) to the latest API and ILSAC services. All that being said, I have nothing against lighter weight oils, as they have their place, and their place is more common. Also, if any SOPUS reps may be reading this, I believe QS Defy 5w-40 would sell quite well, and since it's sold in the high mileage oil market, wouldn't cannibalize your Rotella T6 sales. I'd probably start using it once I use up my stash of Defy 10w30.
10W-30
- Thread starter Red91
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I still run 10w30 in my jeep and the girls tahoe.
10W-30 is superceded by 5w30.
There's really no reason to use a 10w30 over a 5w30 other than price.
I have 10w30 oils in my stash only because I got them at a price I couldn't pass up.
A 10w30 is fine in warmer weather here and is fine anytime in your climate.
It just isn't the first choice.
There's really no reason to use a 10w30 over a 5w30 other than price.
I have 10w30 oils in my stash only because I got them at a price I couldn't pass up.
A 10w30 is fine in warmer weather here and is fine anytime in your climate.
It just isn't the first choice.
See, I run it in my truck, and does just fine. Also notice it runs well in the rare instances it gets into the single digits down here, which hasn't been too rare this year. I've seen that it's shown to be good well into the negative digits as well.
In my climate I would have no problem running a 10w30 in the summer or a "normal" winter. Cant beat the price either! Seems like you can always find a great deal on it.
10w-30 was on the oil cap of a T&C 4.0L engine that I serviced last year. I was shocked to see it on a 2010 model.
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In the older days dino 10w30 doesn't shear and evaporate as much as dino 5w30, but today the oils are blended good enough that it is no longer an issue in dino. Unless I'm extending OCI and drive long highway miles, 5w30 should be better for start up protection for most of my driving.
Both would be very good in synthetic. I still buy 10w30 if the store runs out of 5w30 on discounts.
Both would be very good in synthetic. I still buy 10w30 if the store runs out of 5w30 on discounts.
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It's certainly out of vogue here at least, but I find 10w30 simply works well in anything I've ever dumped it in. In fact before my BITOG thing started, I used it exclusively in everything for decades, and never a problem or complaint even in winter. It works.
I use a lot more 5w30 since coming here, but still don't look down my nose at 10w30 one bit. "Obsolete" is silly IMO.
I use a lot more 5w30 since coming here, but still don't look down my nose at 10w30 one bit. "Obsolete" is silly IMO.
Originally Posted By: Red91
(central Alabama)
Obsolete
Now that the 0W's are prevalent, you could also make a case that 5W oils are obsolete. Even at Alabama engine starting temps (is that where they make Mobile 1?) its good to have a oil with a viscosity closer to operating at startup when most wear occurs.
It's really that simple for me.
(central Alabama)
Obsolete
Now that the 0W's are prevalent, you could also make a case that 5W oils are obsolete. Even at Alabama engine starting temps (is that where they make Mobile 1?) its good to have a oil with a viscosity closer to operating at startup when most wear occurs.
It's really that simple for me.
I bought some when the nextgen hm was on sale for $5 for a 5quart jug. i will use this in the saturn and the olds during the summer.
Originally Posted By: fdcg27
There's really no reason to use a 10w30 over a 5w30 other than price.
There it is.
There's really no reason to use a 10w30 over a 5w30 other than price.
There it is.
Originally Posted By: spasm3
I bought some when the nextgen hm was on sale for $5 for a 5quart jug. i will use this in the saturn and the olds during the summer.
Originally Posted By: Zaedock
Originally Posted By: fdcg27
There's really no reason to use a 10w30 over a 5w30 other than price.
There it is.
I agree i prefer 5w 30 i only bought the 5 jugs because of the price.
I bought some when the nextgen hm was on sale for $5 for a 5quart jug. i will use this in the saturn and the olds during the summer.
Originally Posted By: Zaedock
Originally Posted By: fdcg27
There's really no reason to use a 10w30 over a 5w30 other than price.
There it is.
I agree i prefer 5w 30 i only bought the 5 jugs because of the price.
JHZR2
Staff member
Originally Posted By: fdcg27
10W-30 is superceded by 5w30.
There's really no reason to use a 10w30 over a 5w30 other than price.
I have 10w30 oils in my stash only because I got them at a price I couldn't pass up.
A 10w30 is fine in warmer weather here and is fine anytime in your climate.
It just isn't the first choice.
Agreed. Past studies indicated better startup MPGs running 5w30, which is why it was selected. Before the last couple rounds of API, ILSAC and ACEA ratings, the 5w30 oils were pretty poor in that they would shear quickly to a 20wt, and had a lot of VII, making 10w30 a better, if "retro" choice.
With the latest specs and quality of the 5w30 oils out there there indeed is little if any benefit to a 10w30 oil anymore, unless it has a lower cost, or some variation on operating viscosity that makes sense for a specific engine and use profile.
10W-30 is superceded by 5w30.
There's really no reason to use a 10w30 over a 5w30 other than price.
I have 10w30 oils in my stash only because I got them at a price I couldn't pass up.
A 10w30 is fine in warmer weather here and is fine anytime in your climate.
It just isn't the first choice.
Agreed. Past studies indicated better startup MPGs running 5w30, which is why it was selected. Before the last couple rounds of API, ILSAC and ACEA ratings, the 5w30 oils were pretty poor in that they would shear quickly to a 20wt, and had a lot of VII, making 10w30 a better, if "retro" choice.
With the latest specs and quality of the 5w30 oils out there there indeed is little if any benefit to a 10w30 oil anymore, unless it has a lower cost, or some variation on operating viscosity that makes sense for a specific engine and use profile.
Honda recommends dino 10W30 for S2000 since the model year 2000. Back then dino 10W30 was more shear stable than 5W30, since many track their S2000 and it can be rev to 9,000 RPM, no S2000 owners like to try dino 5W30.
With synthetic, I'm running a mix of M1 0W20 and 0W40. I think synthetic 10W30 is dying, Costco doesn't carries it anymore.
With synthetic, I'm running a mix of M1 0W20 and 0W40. I think synthetic 10W30 is dying, Costco doesn't carries it anymore.
Originally Posted By: Gabe
I think 10w30 has fallen into a niche. While the vast majority of cars on the road would be better served with a 5w oil, there are still the taxis, delivery vans, and people carriers that would benefit from less VII.
+1
I think 10w30 has fallen into a niche. While the vast majority of cars on the road would be better served with a 5w oil, there are still the taxis, delivery vans, and people carriers that would benefit from less VII.
+1
Originally Posted By: fdcg27
A 10w30 is fine in warmer weather here and is fine anytime in your climate.
It just isn't the first choice.
According to most temperature charts, it's supposed to be fine at any temp above zero...
A 10w30 is fine in warmer weather here and is fine anytime in your climate.
It just isn't the first choice.
According to most temperature charts, it's supposed to be fine at any temp above zero...
Originally Posted By: Merkava_4
Originally Posted By: fdcg27
A 10w30 is fine in warmer weather here and is fine anytime in your climate.
It just isn't the first choice.
According to most temperature charts, it's supposed to be fine at any temp above zero...
It is fine and we used it in below freezing temps with a GM 4.3 in a Astro van and the motor ran like new.
But that being said 10W30 is not my first choice in a oil grade. Even in the SW U.S.
Originally Posted By: fdcg27
A 10w30 is fine in warmer weather here and is fine anytime in your climate.
It just isn't the first choice.
According to most temperature charts, it's supposed to be fine at any temp above zero...
It is fine and we used it in below freezing temps with a GM 4.3 in a Astro van and the motor ran like new.
But that being said 10W30 is not my first choice in a oil grade. Even in the SW U.S.
Originally Posted By: dlundblad
Random question. If 5w and 10w 30 are both so similar, how can people get different wear numbers?
Ive actually seen better numbers with 10w oil. How's it possible?
Interesting. Care to post a link?
Random question. If 5w and 10w 30 are both so similar, how can people get different wear numbers?
Ive actually seen better numbers with 10w oil. How's it possible?
Interesting. Care to post a link?
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