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Old 07-22-08, 12:28 PM   #1
phantomcow2
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Engine oil additives

What are your thoughts about engine oil additives, such as Slick 50? I'm talking about the things which are supposed to reduce friction and reduce wear in the engine, possibly improving fuel economy. There's a bunch of these on the market, but slick 50 comes to mind first. I suspect their claims are wildly inflated, and that frequent oil changes is the best thing you can do. I will admit that this is unsubstantiated speculation, though.
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Old 07-22-08, 12:39 PM   #2
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There's also those spark plugs that add about 5 mpg to the car's performance.
Certain engines wont respond to them though.
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Old 07-22-08, 12:40 PM   #3
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Pointless. Best preventative maintenance is to change your oil and filter regularly. Next best thing after that (if you feel like splurging) is to use a synthetic oil provided your car isn't already considered a high mileage vehicle.
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Old 07-22-08, 12:47 PM   #4
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Yeah, use synthetic oil for best performance and economy. Mobil-1 filters are also the best if you can find them, stay away from crappy Fram. Supposedly some cars that's been using dino oil leak when switched to synthetic, but I haven't seen that. But yea, it's a waste of money if you have a high-mileage car that's already worn out and close to the scrapyard.
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Old 07-22-08, 12:47 PM   #5
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My car has seen synthetic oil changed at ~7500 mile intervals since it's birth over a decade ago. It's a high mileage vehicle now, the engine is in great shape, and I think some of this can be attributed to the diligence of oil changes. I was in autozone a few days ago to buy some gaskets and checked out the shelf of additives: oil additives, fuel additives, coolant additives. Some of these things are expensive, like 20 dollars per bottle! It's fascinating to see what the market will bear.
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Old 07-22-08, 12:49 PM   #6
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Danno-
Regarding oil filters, check out this article: http://www.knizefamily.net/minimopar...ers/index.html

Now I'm all excited, I think I'll go change my oil right now!
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Old 07-22-08, 01:03 PM   #7
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330K miles on my Jeep using the cheapest dino I could find every 3k. My little Infiniti has 210K miles now using cheap dino and my Land Rover is at 80K on dino as well. My wife's VW is turbocharged and notorious for sludging so I've used synthetic every 5k miles. It's got 110k miles on it and no problems. All of my vehicles use Purolator oil filters.
Stay away from additives.
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Old 07-22-08, 01:18 PM   #8
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changing the oil regularly is the single most beneficial thing you can do for a car. Oil additives are next to useless.
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Old 07-22-08, 01:27 PM   #9
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there's also those high-mileage motor oils. They have additives that help moisturize the
gaskets and various rubber parts that can get cracked with age.
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Old 07-22-08, 01:51 PM   #10
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Danno-
Regarding oil filters, check out this article: http://www.knizefamily.net/minimopar...ers/index.html

Now I'm all excited, I think I'll go change my oil right now!
Yeah, that's a good site. Check out the Oil Filters Revealed page for detailed survey with dissection. Summary on the Opinions and Recommendations page, notice how pretty much all of the FRAM filters are in the "to avoid" section .

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Old 07-22-08, 02:08 PM   #11
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After owing a few Hi-Performance Air Cooled VW's.......
Oil.....Royal Purple
Filter WIX

Try as one might there is not a better Synthetic Oil than Royal Purple.
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Old 07-22-08, 03:06 PM   #12
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Well, when you start getting into the catergory of super synthetic oils ($8-10+ per quart), they're all about the same.

(i'm an Amsoil user myself with only OEM subaru filters)
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Old 07-22-08, 04:12 PM   #13
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In accordance with what I was taught in school, I used EOS every other oil change for the hydrochloric acid, which is said to eat away at the shiny metal, causing oil to stick to all the surfaces, hopefully extending the life of the engine, and making sure nothing goes bad pre maturly. Now that GM qit making EOS, a replacement that I use is Positrack cleaner. In a 4 cylinder, half a tube would do it.

Other than that, I don't really think that anything but good filters and good oil is useful, aside from maybe trying to extend the life of an engine after it god messed up by using thicker oil.
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