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Old 11-20-2005, 11:16 AM   #1
Glenn/RZ500
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Synthetic oil and fuel economy

I listen to a car show on Sat. mornings on CFRB 1010 with a certified master tech. She took a call from a listener with an `05 Focus who was complaining of poor gas mileage on a low mileage motor.As she told the caller that many new Fords will get improved mileage after a few thousand kms. or more she added that he try a synthetic oil to lower gas consumption. I just had my first change done by my dealer at 3 thou. kms. and am going to switch to a full synthetic next change. Any suggestions for a brand and weight? I used 10/30 and 5/50 synthetic Quaker State in my Escort GT prior to the Focus. As she stated my mileage has improved a small amount with time. Thanks, Glenn.


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Old 11-20-2005, 11:35 AM   #2
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Redline and Royal Purple scpecialize in racing/synthetic oils/liquids for vehicles. The weight depends on where you live. I've got Mobil 1 synthetic right now and I really havn't noticed much of a difference in my milage, about 2500 miles in. One thing about syn, YOU CAN'T CHANGE BACK to conventional oil. If you know someone who has a subscription to Modified, borrow a copy of the November 05 issue, theres an article about synthetic oil, starts on pg 94.
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Old 11-20-2005, 11:37 AM   #3
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i know that when i started using Royal Purple in my svt my gas mileage went up like 2-3mpg more.............like right now i average around 32-33 in my svt with a mix of city and hwy
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Old 11-20-2005, 12:01 PM   #4
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Royal Purple, redline, amsoil and Mobil 1. That is the order I'd put them. In reality Amsoil is supposed to be the best but it's real hard to find and I don't like there marketing plan of bad mouthing every other oil on the market. You can get Royal Purple at most auto parts stores and its only alittle more than Mobil 1. Royal purple claims a 3% increase in gas milage so with todays prices it wouldn't take long to have the oil pay for itself.
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Old 11-20-2005, 12:55 PM   #5
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Quote:
Originally posted by jeeptofocus
Redline and Royal Purple scpecialize in racing/synthetic oils/liquids for vehicles. The weight depends on where you live. I've got Mobil 1 synthetic right now and I really havn't noticed much of a difference in my milage, about 2500 miles in. One thing about syn, YOU CAN'T CHANGE BACK to conventional oil. If you know someone who has a subscription to Modified, borrow a copy of the November 05 issue, theres an article about synthetic oil, starts on pg 94.
Your phrase, you can't change back, that is a myth. The most reputable mechanics I talk to actually agree on a MIX between synthetic and non synthetic. But you can definetly change back, just think of the next person to buy your car, do you really think they are going to use synthetic
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Old 11-20-2005, 01:31 PM   #6
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ok so can someone break this down for a n00b..

this is my first car...

So
- what is the advantage of synthetic
- I need better filter, right?
- what is the price difference?
- can I generally bring my own oil to a dealer?


Thank and sorry for being a n00b.

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Old 11-20-2005, 03:05 PM   #7
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Advantage of synthetic = better additive package and extended drain intervals. You should also get a little better gas mileage.

Filter: Motorcraft filter is a good filter. Widely available and cheap are pluses.

Autozone here sells Motorcraft at $2.29 a qt and Mobil-1 for $5.19 a qt. Costo sells a case of 6 Mobil-1 for $24.99. In general, prices for synthetic are at least double.

I am sure you can bring your own oil to the dealer, but I wouldn't trust them. I change my own oil.

OT: Is Royal Purple oil still purple? he can take that to the dealer and then he can check to see if they really put in RP, LoL.
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Old 11-20-2005, 06:51 PM   #8
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Walmart rules! $37.99 gets you a Mobil oil change with a motorcraft filter and they also throw in a tire rotation. I think ford charges $60 for a synthetic oil change.

Last edited by 2K5 FOCUS ST; 11-20-2005 at 08:10 PM.
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Old 11-20-2005, 07:42 PM   #9
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Geisto lists mobil one $5.19 a qt and I buy Royal Purple from Pep boys for $5.25qt. The diffrence in locations may play a factor in the prices but if your going full synthetic you might as well get the best in Royal Purple, Redline or Amsoil.
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Old 11-20-2005, 10:54 PM   #10
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Sorry if I was wrong about the switching thing, I've heard it from multiple sources though without hearing it's okay to mix.

So if you're going syn, get a top brand like Royal Purple, I've seen a dyno somewhere showing RP vs. conventional oil and the RP scored like 2hp more on a Zetec. However don't look into this, a gain that small could be just from the way they ran the car on the dyno.
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