Syntec

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Since Syntec is not really synthetic how long could one go if using synthetic. 6 months or more or less than that also how many miles. Thanks
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Originally posted by car_nut_00:
Since Syntec is not really synthetic how long could one go if using synthetic. 6 months or more or less than that also how many miles. Thanks
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c_n_00,

I'm not sure I understand your question. Do you want to know how long to go on Syntec or another oil you consider "really synthetic" or what? By the way, I wouldn't worry about any of the Syntec line, but especially not the Green Elixer of Car Nutness and Total Automotive Advancement. (If that last part doesn't make sense to you, you need to follow dropitby's advice.)
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My guess is that you are talking about the "fight" between Mobil 1 and others about what a synthetic oil is. Mobil 1 lost the fight and others can call themselves synthetic too.

The latest data I saw said about 8,000 miles on synthetic oil is pretty safe given you are using a good oil filter.

I run 10,000 miles on Mobil 1 and have had no problems in 150,000 miles on this Van and 140,000 miles on my previous van.
 
quote:

Originally posted by Ugly3:
My guess is that you are talking about the "fight" between Mobil 1 and others about what a synthetic oil is. Mobil 1 lost the fight and others can call themselves synthetic too.

The latest data I saw said about 8,000 miles on synthetic oil is pretty safe given you are using a good oil filter.

I run 10,000 miles on Mobil 1 and have had no problems in 150,000 miles on this Van and 140,000 miles on my previous van.


I'm not trying to ignite another one of those Syntec wars that crop up here from time to time, but the fight wasn't about whether the others could call themselves synthetic or not, it was over what type of oil can be called synthetic. Castrol was using crude oil, which is fed directly into the process that results in the so-called Group-III base oil. Mobil was making a predominantly Group-IV base oil, which begins processing as ethylene gas (which, unless you're doing something really exotic, itself came out of an oil well at some point).

Maybe the best way to characterize this whole "debate" is to ask, "how synthetic is your synthetic???"

As to oil life, I'd add that it's very engine specific. Any given oil is going to have a much easier go in a healthy GM 3.8L than it will in, say, a 2000 Toyota Sienna with the 1MZ V-6 which if not watched carefully, can reduce any oil to sludge in just a few thousand miles.

Edit for typo.
 
quote:

Originally posted by car_nut_00:
Im just trying to find out how long one could ride with syntec 6 months or more or over 3000 miles

From what I read here Syntec is a great oil and according to some of the UOA's I have read it should easily last 6-7.5k OCI's. Personally I could care less if an oil is a "real" synthetic or not. I do use M1, but am actually thinking of trying Syntec at my next OCI. A good oil is a good oil reguardless of orgin.
 
That is a loaded question.

The German Made Castrol Syntec 0W-30 would go longer than most any Mobil 1 in my opinion. 10,000-15,000 mi is doable depending on engine and driving habits.

Mobil Delvac 1 5W-40, Mobil 1 Truck and SUV 5W-40, and possibly Mobil 1 0W-40 migh be exception to this rule.

Normal Group III 5W-30/10W-30 Syntec is a pretty solid 7500 mi oil.

Castrol Syntec 5W-40 (Belgium) is designed for extended drains and would likely do very well although it is only a group III by all reports. The new Syntec 10W-40 appears to be a very well built oil and might do pretty wel although it is partly Group III.

Mobil 1 10W-30 is a solid 9,000 mi oil in alot of cases. In the past I have not had results with the 5W-30 to make me feel it was really all that superior to Group III Castrol. 7500 mi or so.

Some people with bypass filters run Amsoil to 30,000 mi.

It has alot to do with engine design as well as the IL State Police used to get 15,000 mi out of Mobil 1 Synthetic with GM 5.7L LT1 but when they switched to the Ford 4.6L SOHC this lead to engine failures.

As you can see your question is a bit to simplified to have much merit.

You need to state:
1. Make
2. Model
3. Engine
4. Mileage
5. Climate
6. Driving Habits

Then someone should be able to give some recommendations as to a well matched Oil and approximate OCI.

Gene
 
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Glad we have a memeber with the new Colorado. There was a thread here not to long ago asking what people thought of the new mid sized Chevys. Nobody knew, cause very few people have driven them yet. Do you have the 4 or 5 cylinder engine? 4x4 or 4x2? Just curious
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It has the 5 banger is the Z71 4x4. I like it its very smooth and isnt underpowered although it feels that way to me because my last vehicle was a 2000 trans am modded with about 400hp so not quite as quick.
 
You can easily go the longest OCI with Syntec or any other synthetic your owner's manual allows, with a margin built in. You can also go farther, with safety, than your owner's manual allows, but I'm not going to tell you to do that...that is your call.
 
Well I have a 2004 Chevy Colorado with 650 miles most miles are chugging around town with maybe some miles on the freeway. I really dont "hot-rod" around town, its just a truck right.
 
quote:

Originally posted by car_nut_00:
Well I have a 2004 Chevy Colorado with 650 miles most miles are chugging around town with maybe some miles on the freeway. I really dont "hot-rod" around town, its just a truck right.

Well you could also use Chevron Supreme and 3k OCI
 
quote:

Originally posted by pscholte:
You can easily go the longest OCI with Syntec or any other synthetic your owner's manual allows, with a margin built in. You can also go farther, with safety, than your owner's manual allows, but I'm not going to tell you to do that...that is your call.

I'm not so sure I agree with that. The 01-04 Corvettes have a 15,000 mile/1 year upper limit. I don't think US made Syntec would be able to last 15k in an LS1 (unless it was one that burned a quart every 2k so it was constantly getting replenished) At the same time, I don't think many Corvette owners would be able to hit 15k before their oil life monitor tells them it's time to change it.

It'll be interesting to see how my oil life monitor in my 98 Corvette stacks up against my chosen intervals. The 97-00 Corvette uses a 10k upper limit for it's oil changes, so it's oil life monitor is calibrated slightly different. I'm honestly not sure why they went with the higher interval for 2001 on though, since nothing drastic changed that would account for it (it uses the same type of oil, same oil capacity, etc.)
 
quote:

Originally posted by car_nut_00:
How does the 5w-30 syntec stack up against mobil 1 5w-30?

In terms of wear, I think it's just as good if not better. In terms of longevity, Mobil 1 is much better. Mobil 1 will also flow better in extreme cold too.
 
quote:

Originally posted by car_nut_00:
I dont drive that many miles but I like to change the synthetic every 6 months will syntec last that long?

I say if you change when the oil life monitor says so then you'll be okay as far as the warranty..Change it at six months and have it analysis done...Then you'll know for sure...

p.s. if GM thinks that their oil life monitor is a good thing and most people use dino oil then syntec should last 6k..But I wouldn't admit saying that...
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