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Old 05-14-2011, 05:21 PM   #1 (permalink)
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Default Best cheap synthetic oil for 10k+?

I was browsing through Walmart and Meijer the other day and noticed Quaker State Ultimate, Mobil Super Synthetic, Meijer Full Synthetic, and Supertech Full Synthetic are all 20 bucks or less for 5 quart jugs. I'm thinking about making the switch from Mobil Super 5000 that I get for 12 bucks. I change the Mobil Super 5000 every 5000 miles along with a new Motorcraft filter. I'm looking to get 10k+ if I make the switch. Is it worth it er no?

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Old 05-14-2011, 07:05 PM   #2 (permalink)
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I think you're pushing it leaving oil in that engine (with that kind of mileage) for 10,000 miles. You're probably losing some oil in between oil changes. You need to be checking and changing the oil MORE often, not less. I'm surprised you're going 5000 miles in between changes. I've got a '97 GL Vulcan with almost 200,000 miles on it and I can go upwards of 4,000 miles, but I notice some missing oil when I let it go that long.

FWIW, I use SuperTech oil and filter. $13 for my oil changes. I change it every 3500 miles or so. I'm thinking of going sythetic with my 2011 Equinox, but the Taurus and '02 Impala (almost 150,000 miles) are sticking with the "dino" oil.
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Old 05-14-2011, 08:30 PM   #3 (permalink)
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Originally Posted by Colt Hero View Post
I think you're pushing it leaving oil in that engine (with that kind of mileage) for 10,000 miles. You're probably losing some oil in between oil changes. You need to be checking and changing the oil MORE often, not less. I'm surprised you're going 5000 miles in between changes. I've got a '97 GL Vulcan with almost 200,000 miles on it and I can go upwards of 4,000 miles, but I notice some missing oil when I let it go that long.

FWIW, I use SuperTech oil and filter. $13 for my oil changes. I change it every 3500 miles or so. I'm thinking of going sythetic with my 2011 Equinox, but the Taurus and '02 Impala (almost 150,000 miles) are sticking with the "dino" oil.
I lose no oil between changes. Fluid level stays the same. The car has 260k on it (original motor and trans).
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Old 05-14-2011, 10:11 PM   #4 (permalink)
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A 5 qt jug of Mobil 1 Extended Life oil is only $28 at my local Walmart. Change the oil filter at 5k or 7k, depending on conditions, replace the .5 qt of oil that the filter holds. I always used Motorcraft filters (also at Walmart). As long as the engine and pcv system is still in good shape and running right, I see no reason why you can't have 10k intervals with M1 EP. When first changing over to extended life oils, the first two changes should be done at the usual 5k intervals, before going to 10k intervals (M1 tells you that on the bottle).

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Old 05-14-2011, 10:16 PM   #5 (permalink)
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You've MEASURED what you've put in and then MEASURED what came out 5000 miles later and it's the same amount?

Hard to believe at over 250,000 miles, but if true, then maybe you could justify synthetic at $4/quart and try changing it at 10,000.

But I'd be checking the dipstick FREQUENTLY after 5000 because there's gonna be a mileage number after which you WILL start to lose oil. You don't want to go the full 10,000 and then find only 3 quarts comes out during the oil change...
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Old 05-14-2011, 10:23 PM   #6 (permalink)
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It sounds like he's willing to pay DOUBLE for the synthetic oil, but he wants to do his oil changes HALF as often (so it's a wash, cost-wise). But I wouldn't bother. If he's changing oil every 5000 miles, that's probably only 3 times per YEAR ! What's the big deal ? He's not going to see any appreciable gain in mileage going to synthetic. Even 0W-30 claims only a 2% increase in mileage (1/2 mpg on a 25 mpg car like the Taurus).

Synthetic oil is just another racket. Once they get rid of "conventional" oil all together, they'll be telling us to change our oil more often and we'll be paying $7-$10/quart for synthetics. The end result will be bigger profits. Same old story in this country...

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Old 05-14-2011, 10:44 PM   #7 (permalink)
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Quote:
Originally Posted by Colt Hero View Post
You've MEASURED what you've put in and then MEASURED what came out 5000 miles later and it's the same amount?

Hard to believe at over 250,000 miles, but if true, then maybe you could justify synthetic at $4/quart and try changing it at 10,000.

But I'd be checking the dipstick FREQUENTLY after 5000 because there's gonna be a mileage number after which you WILL start to lose oil. You don't want to go the full 10,000 and then find only 3 quarts comes out during the oil change...
I kid you not. The car uses NO oil. I put 5 quarts in and 5000 miles later 5 quarts came out.
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Old 05-15-2011, 12:46 AM   #8 (permalink)
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Among the four synthetics the OP mentioned, I would go with Quaker State. Excellent oil, I use it in my 2005 Toyota Sienna and like it.

I put the cheapest brand name dino oil and Motorcraft filter on my Taurus. I routinely go 5k-7k miles between OCs.

My car has a Duratec. Seriously, both the Duratec and the Vulcan can take some abuse. The engine in your car is probably going to outlive most other components.

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Old 05-15-2011, 09:30 AM   #9 (permalink)
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The problem witht he 4 synthetics mentions is that only one of them are is a true synthetic. They others are all hydrocracked to a point, but by that standpoint all oil has hydrocracked components. All those oils fall under the group 3 class, which is basically a highly refined conventional oil. The Mobil1 is a group4 base stock, which means the base oil is a class of special molecules that are engineered. They are produced in a catalyzed process to procude molecules of a specific size and shape, with specific chain lengths. The reduce is a class of molecules called esters. These esters have some unique properties well suited to extended oil change intervals. For one, the act like detergents, reducing the need to add a detergent later, and increasing the amount of sludge they will dissolve and hold in solution. They are very resistant to breaking apart from oxidation, severe heat, or sheer stress. Most oils oxidize and that causes them to become acidic and self contaminating, reducing the lifespan of the oil.

I myself run Royal Purple. I ran it in my Aerostar for years, and am running it in my Taurus. I go about 20,000 miles between oil changes. I use Mobil1 extended life filters, which are good for about 10,000 miles.
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Old 05-15-2011, 12:19 PM   #10 (permalink)
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I think Quaker State Ultimate (made by Shell) is also a true Group 4 synthetic?
Personally, latelly I use Shell Rotella T6.

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