GM dealer filled oil with conventional 5W30 vs synthetic, should i worry?

jalikaria24

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388
was -13 fahrenheit last night, having nightmares of those 'cold flow' videos off youtube. truck sounds fine tho when it starts/runs
 
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35,628
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NY
No disrespect intended. With 215K miles on the vehicle in all honesty I wouldn't lose too much sleep over it, unless I was charged for synthetic oil and got conventional oil instead. A 5W30 conventional oil will be fine, if it bothers you that much shorten the OCI. The conventional oils of today are quite good.
 
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21
Location
Aitkin,MN,USA
ok so i have a 2007 cadillac escalade with 215,000 miles on it. It has the factory 6.2L engine. for all of its life ive been filling with synthetic 5w30 when i goto the dealer. this time the guy asked what i wanted and i said synthetic but then he went on break and i guess the other guy followed the computer and apparently it said conventional/reg 5w30 was fine? i thought gm dealers/cadillac dealers always tried to push the 5w30 dexos but thats besides the point. so i have read many threads and it seems like conventional and synthetic perform basically the same and the only reason to run synthetic is for longer oci's. I never really cared for higher OCI's, i just follow the OLM. However I just want to ensure that this conventional fill wont affect anything? like i also heard that if you run conventional all the time then switch to synthetic late in the vehicles life you can run into leak issues. my truck is pretty high mileage so i just wanna ensure that its okay for this oil change to be with the reg 5w30 even tho ive ran synthetic all its life. the main thing that bums me out is that its gonna start getting cold here as cold as -40fahrenheit and i kinda wanted the synthetic for better cold startups, not sure if there will be a big diff between conventional and that for cold temps. i expect the temps to be between -4f and -22f mostly this winter and could get colder to -40 for a day or 2


so my main question is, should i drain the conventional asap and fill some store bought 5w30 or is it fine to keep the reg 5w30 for this oil interval even tho my truck is high mileage and always ran synthetic. i just dont want any problems like leaks or other problems etc

btw i dont even know what oil they ran, it just says reg 5w30 but its a cadillac/gm dealerhsip any ideas? seems to be from the pump machine rather then jugs
thanks!
2007 Caddy..conventional is ok per your owners manual I think.
Switch back to your full syn next change. I.am surprised the full synthetic in that old engine..didnt take out the seals and gaskets and create obnoxious leaks
I highly re commend WIX oil filters. Me? I have a 2005 GM 3.5ltr V6 that loves FVP and Dollar store 5w30 API SN and SN+..at <$3/qt. I am prejudice against Supertech oil and their oil filters with no silicone ADV valves are not good.
 
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21
Location
Aitkin,MN,USA
Seems like us “spring chickens” are up late in the work week for some reason 😷
I have a dealer that accepts customers bringing their oil and filter of choice..and for 22.50 including tax etc hits my 12 zerks, rotates my tires, does inspection and gives me accurate 3 page report. Yes..his std labor rate is $130/hr..so..I have them install a battery once..that is all. The old Montana battery is ..BURIED...as is the thermostat and alternator..fyi.
 
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17,036
Location
Upper Midwest
2007 Caddy..conventional is ok per your owners manual I think.
Switch back to your full syn next change. I.am surprised the full synthetic in that old engine..didnt take out the seals and gaskets and create obnoxious leaks
I highly re commend WIX oil filters. Me? I have a 2005 GM 3.5ltr V6 that loves FVP and Dollar store 5w30 API SN and SN+..at <$3/qt. I am prejudice against Supertech oil and their oil filters with no silicone ADV valves are not good.
So you’re new here?
 

4WD

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16,644
Location
Texas
I have a dealer that accepts customers bringing their oil and filter of choice..and for 22.50 including tax etc hits my 12 zerks, rotates my tires, does inspection and gives me accurate 3 page report. Yes..his std labor rate is $130/hr..so..I have them install a battery once..that is all. The old Montana battery is ..BURIED...as is the thermostat and alternator..fyi.
After buying the vehicle … found out my Jeep has a second “buried” battery … too bad they could not of used one oversized battery in conjunction with the over sized alternator it has …
 
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1,359
Location
south dakota
I would run it 2000 miles and change it. I believe you will notice the oil is a darker color than it would be with a full synthetic. I had a quick lube place change the oil in a 99 Ford Expedition I owned and I could tell later on the oil was darker than normal. I have to believe they put a conventional oil it. Synthetics seem to keep a more clean color a lot longer than regular oils. Just my .02 cents.
 
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195
Location
DFW, Texas
When I worked at GM dealer few years ago I was told the "Bulk Oil' was Mobil 1 ??

I guess it varies in certain regions/Countries ?? :unsure:

I remember once a visiting QC inspector from GM telling me that if a engine fails using a AC/Delco filter or AC/Delco motor oil that it's covered under a GM warranty. Case in point he told me a story of a 3800 V6 engine in a police impala that got replaced due to a defective Delco oil filter :oops: :oops:


Dave
 
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