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Discussion Starter #1
What would you put in it if it was yours? Conventional or Full Synthetic?
 

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Milf Hunter
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I see no need to spend the extra money on synthetic oil its only a tahoe... Just think about it this way once you go synthetic i hear your not suppose to go back to conventional oil. I would stay conventional :imo .
 

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Discussion Starter #4
well we plan on keeping it 6-8 years, so in that case, would you use synthetic?
 

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My Dixie Wrecked
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Synthetic blend so then you won't have to decide.
 

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I have been using Mobil1 10-30 Full Syn since day1 just hit 120K no engine trouble yet. (Knocks on wood)
 

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Resident Guinea Wop
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:lol: I would say if it's a lease or something that you don't plan on keeping past the initial GM warranty then no.

But yeah, I run Mobil1 in my truck for one main reason. Longer oil life.

7500 miles between changes, and little to no discoloration. It's expensive though.
 

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I still change it a 4k instead of 3k but I would never go as long as matt.
 

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GMFS Sr. Canadian Member
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well the longer intervals between changes is nice.. buddy at work went 16k without changing oil
 

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where do you do this at? haha jk i run castrol ands change it every 1500-2000 miles. i wouldnt worry about synthetic. its a chevy imo
 

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GM Trucks & UA
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Go ahead with full synthetic, the cost levels out because you won't be changing it as often, so if nothing else, you won't be under the truck as often...
 

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Dude on Internet
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I run MobilOne 10w30 @5000mi intervals with a MobilOne filter as well. If you do it yourself, running the Mobil at that interval is cheaper than paying someone to put in Castrol every 3000mi. At least for me it is. You COULD find some cheap as place to change your oil, but do you really know wtf theyre doing with your car? In my experience, most reputable and trustworthy places charge between $35-$40 +Tax for conventional Castrol 10w30 every 3000mi. After the one-time cost of ramps, a filter wrench, and a funnel, it is cheaper for me to run a high quality synthetic oil and premium filter in my truck than it is to pay someone put in mediocre oil and a no-name filter.
 

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I go by the old tried and true oil. I don't mind changing the oil. Let's me get a good look at everything under the vehicles. I spend like 25% of the time just checking out stuff.
 

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Member # 625
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I spend like 25% of the time just checking out stuff.
On the weekends I work on my truck, especially during the summer, I could just lay under the truck for hours looking at stuff, taking naps, etc.:D
 

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The Oil Life System is tried and true....however, as others mentioned....there are things that need checked more often. Like tire pressures! And grease!

I use good ol' conventional motor oil. Synthetic is very good oil...but it is pricey. Worth it? How much abuse do you give your vechile?
 

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i have a friend thats a dealer for amsoil, he says if you change eveything to amsoil synthetic (motor,trans,rear end) you can get a 2-3 MPG differnce.
he also talked about a deal that when running they're synthetic you dont have to change your oil for 25,000mi.......just a 12,500 filter change,add a quart, and run it.......
i wont buy into synthetic, if its so good why do some "high performance" people run regular oil? have a friend in sprint cars...ran synthetic and lost oil pressure......to 0!
 

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Synthetic oil is thinner....thats why it works better....gets in the smaller places easier.

As far as the people with high performance engines using dino oil.....well....most of the time those guys change the oil very often...once every pass, heat, or even night....the advantages of synthetic is lost then.

Check out bobistheoilguy.com.
 

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i have a friend thats a dealer for amsoil, he says if you change eveything to amsoil synthetic (motor,trans,rear end) you can get a 2-3 MPG differnce.
he also talked about a deal that when running they're synthetic you dont have to change your oil for 25,000mi.......just a 12,500 filter change,add a quart, and run it.......
i wont buy into synthetic, if its so good why do some "high performance" people run regular oil? have a friend in sprint cars...ran synthetic and lost oil pressure......to 0!
I have never tried it but if you remove the filter doesn't all of your oil drain out or is the pan actually lower and you only lose a quart?
 

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GMFS OG Member
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I have never tried it but if you remove the filter doesn't all of your oil drain out or is the pan actually lower and you only lose a quart?
No, only the oil that is in the filter and passage leading to the filter. Most of the oil is in the oilpan. Depending on the size of the filter it could be a quart but on these trucks its probly less.

I use Mobil 1 in my Silverado with 5K intervals. I swithed my 93 to synthetic at 150K. It never leaked but used a couple of quarts between oil changes because of bad valve seals and generaly driving the piss out of it.
 

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Why would you not use full synthetic? I mean you just bought an 07 tahoe so your probably not hurting for money. Synthetic oil doesn't break down like regular old dino oil will. Really the only you have to change synthetic oil every 5000 or 7500 miles is because it gets dirty. This stuff just doesn't break down it gets dirty. If some company came out with a super duper 1 mic-tic-dicron or something filter you'd probably not have to replace the oil for like 30000 miles or more. You might as well start off right and use the good stuff. Why would companies make synthetic oil if it wasn't an improvement over regular non-synthetic oil? I can definitely see using regular oil on old cars or maybe your lawnmower or something but definitely not a new automobile. Hell i bet it even says on your oil fill cap to use 5w30 synthetic.
 
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