Bulk oil at Chevy GM dealer

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Bought a used 2011 Mazda 2 with 50 k miles from a local Chevy dealer recently. They serviced the car of course before the sale. I asked a service mgr. what oil they used, and he said 10 w 30 bulk conventional oil. (Filter is a AC/delco pf 1237) Of course this car calls for 0 W 20 on the oil filler cap. While at the dealer I noticed some of the new Chevys on the lot mentioned they were filled with 0 W 20 oil on the window sticker. I'm just curious if most larger sized car dealers (this one is pretty large) have more than one bulk oil tank underground so that they can buy a couple of different types/weights of oil in bulk.
 
Originally Posted By: Electromotive
Bought a used 2011 Mazda 2 with 50 k miles from a local Chevy dealer recently. They serviced the car of course before the sale. I asked a service mgr. what oil they used, and he said 10 w 30 bulk conventional oil. (Filter is a AC/delco pf 1237) Of course this car calls for 0 W 20 on the oil filler cap. While at the dealer I noticed some of the new Chevys on the lot mentioned they were filled with 0 W 20 oil on the window sticker. I'm just curious if most larger sized car dealers (this one is pretty large) have more than one bulk oil tank underground so that they can buy a couple of different types/weights of oil in bulk.


The cheapest oil they could purchase in bulk. That of course doesn't necessarily mean it is bad if it is API SN however it is still the wrong weight of oil for your car. Just run it 5k miles and do the oil change yourself or take it to a reputable shop who is knowledgeable enough to put in the proper oil.

2011 Mazdas require 0w20 oil which is a synthetic or synthetic blend. I'd adhere to this especially since you still may be under warranty.
 
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I was at my local chevy dealer doing contracted work. While I was in there service department, I got to talk to a mechanic. He told me they have a bulk tank and it stores 5w30, but they do whatever the vehicle requires. So of course, no new or a couple years old vehicle would be filled from the bulk tank. He told me they will be putting in a second one to hold the Dexos oil. I would presume it would be 0w20 oil, since a fair amount calls for that.
 
Originally Posted By: GMFan
Originally Posted By: Electromotive
Bought a used 2011 Mazda 2 with 50 k miles from a local Chevy dealer recently. They serviced the car of course before the sale. I asked a service mgr. what oil they used, and he said 10 w 30 bulk conventional oil. (Filter is a AC/delco pf 1237) Of course this car calls for 0 W 20 on the oil filler cap. While at the dealer I noticed some of the new Chevys on the lot mentioned they were filled with 0 W 20 oil on the window sticker. I'm just curious if most larger sized car dealers (this one is pretty large) have more than one bulk oil tank underground so that they can buy a couple of different types/weights of oil in bulk.


The cheapest oil they could purchase in bulk. That of course doesn't necessarily mean it is bad if it is API SN however it is still the wrong weight of oil for your car. Just run it 5k miles and do the oil change yourself or take it to a reputable shop who is knowledgeable enough to put in the proper oil.

2011 Mazdas require 0w20 oil which is a synthetic or synthetic blend. I'd adhere to this especially since you still may be under warranty.
They shouldn't have no problem having this oil on hand, since a lot of new GM vehicle calls for 0w20. If that the case, then would a person trust servicing there new GM vehicle there.
 
I'm no fan of Generous Motors but it would seem to avoid warranty problems they wouldn't use an oil which didn't meed GM specifications.
 
Originally Posted By: HerrStig
I'm no fan of Generous Motors but it would seem to avoid warranty problems they wouldn't use an oil which didn't meed GM specifications.


The car in question is a 4 year old Mazda. Which may mean it gets the el cheapo oil from the dealer.
 
It's probably some dexos approved oil. He specifically said 10w30? Seems odd, why would a chevy dealer in 2015 even keep 10w30 around in bulk tanks? dexos1 is 5w30 and lower only and came out 5 YEARS ago. Doesn't make any sense to me. I don't think I've seen a chevy car give the recommended oil as 10w30 in a decade.
 
I'd guess that this service department has used the 10w30 grade for years with no problems.
It was once the most common grade recommended for a variety of makes.
In Georgia, it probably wouldn't make much difference, as long as the oil at least meets API SM or SN.
I'd bet that this service department doesn't recommend drains out to OLM 0% either.
 
I'm surprised you're so calm about this. Some BITOG'ers would be screaming bloody murder if the dealer put 10w30 in their 0W-20 spec'ed car.
grin2.gif
 
I bought a Jaguar from a GM dealer 5 years ago. They put 10w30 in it too. Hasn't it been since the 90's that GM called for 10w30 other than alternative fill option?
 
I asked my local garage the same question recently. They are not a GM dealer, but they service everything and are always busy with old and new carss of all makes and models.

They use two bulk oils, both semi-syhtnetis.
Either 5W30 SM & GF-4 or 10W40 SM & A3/B4.
They use a local generic brand called "Hi-Tec".

There is a second garrage in the area, bigger and busier, does most of the high end work. Their default fill is Valvoline semi-synthetic Durablend 10W40 SN & A3/B4. I suspect they use a SynPower for all the new Mercs and BMWs I see being serviced there, but that's just a guess.

I live in a different country from the OP, so not a fair comparison. But I'm always interested to hear what different places use as their bulk oil fill. My feeling is that they don't carry a big selection, and they seem less fussy about what goes in than the average BITOGer.
 
I worked at a tire shop that had a 300 gallon tank of 5w30. I cringed dumping it into camrys and chryslers marked 5w20, but, hey, $16.99 OCIs get you that. I had a 25 foot stretchy hose dispenser with a quart-counting filler nozzle on the end, pretty sweet. (We billed for over 5 quarts so the ticker was important.)

I reapplied later and they still had the bulk tank but a bunch of 5 gallon pails of the properly thin stuff, including synthetic blends, great for $25 or so. They pumped into a grody pitcher that was then walked over and dumped into cars.
 
Hello, "grody" is sooo SoCal!

I think it just shows you how little dealerships care. They are lying scum. A dealership employee will lie to you when it's easier to tell the truth.
 
I am surprised how many still don't get it. "OIL GRADE IS NOT GOING TO DESTROY YOUR ENGINE". There is such little difference in oil grades unless you are in Siberia or the Sahara, you all put too much emphasize on this. The dealerships don't care because they know it doesn't matter. Quit reading the manual so much. Your killing me. You would think you would understand this or at least experiment. Put some 10w30 in a bottle and some 5w20, then go ask your wife or daughter which is thicker, chances are it will take them awhile if they ever determine, know what??? Your engine never will.
 
You're right. Without extreme temperatures, grades won't matter much. I've ran 15w50 straight in an LS1 which I thought was a bit much, but then I found out that's what Lingenfelter recommends in their LSX builds anyway.
 
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