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Since I started using synthetic motor oil, I have improved my highway mileage buy 3 to 4 MPG, depending on speed. Has anyone found the same improvement?
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Re: Synthetic verses conventional motor oil
Pls advise what oil you were using and what synthetic you are using now.
While full synthetic can provide slightly better MPG over conventional oil, 3 to 4 MPG is generally not typical.Lonestar
It was a smile in every mile
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Re: Synthetic verses conventional motor oil
I have always used synthetic on every Retro to factory spec. I was afraid to use anything else with this engine.
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Re: Synthetic verses conventional motor oil
Nope!.......But that's not why I use it anyway.Originally posted by ewclement View Post
About the only thing I'd put conventional oil in these days is my lawn mower. The protection offered in synthetics vs conventional is worth every single extra penny paid and then some.Comment
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Re: Synthetic verses conventional motor oil
The 'factory ' fill was conventional oil. Does going to synthetic oil void your warenty if anything happens with the engine ?Originally posted by MerlotBlue View Post
MartinB.Comment
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Re: Synthetic verses conventional motor oil
MartinB - that is not correct. the FF was 5W20 Synthetic Blend from Motorcraft made by Conoco-Phillips. Using any approved 5W20 or 0W20 that meets the specific Ford spec noted in your manual WILL NOT void engine warranty. Naturally, none of the 02-05 Thunderbirds are still under warranty unless they are covered under extended warranty.Originally posted by snowbird View PostLonestar
It was a smile in every mile
Gotta love that American RideComment
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Re: Synthetic verses conventional motor oil
Lonestar, Is this just a new name for the same oil? My book for the 02 states to use Motorcraft SAE 5W-20 Super Premium Motor Oil. I have been using the blend from new.They are Here. Scotty, beam me up!IT'S 5 O'CLOCK SOMEWHERE
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Re: Synthetic verses conventional motor oil
Yes, all Motorcraft 5-20 was a synthetic blend. Ford had bottle change once someone found out the Synthetic blend on the bottle would help sell oil, but all the 5-20 was a blend. I think the bottle change happened soon after Motorcraft 5-30 oil became a synthetic blend.Originally posted by Gobird View PostComment
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Re: Synthetic verses conventional motor oil
Not sure if better mileage or not, since I have been using full synthetics from day one and change every 3,000 miles...
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Re: Synthetic verses conventional motor oil
That is correct.Originally posted by XCR440SP View Post
Motorcraft now has a fully synthetic (if you want to call Group III oils synthetic) 5W20 as well as the blend. For 3000 to 5000 mile oil change intervals MC has proven to be a heck of a bang for the buck. Not the best, depending on definition, but used oil analysis always show MC 5W20 a very good oil. It does however start giving up at around the 5K mile mark.
Recently Conoco-Phillips change the formulation of MC 5W20 and the change may prove that it is not as good as it was. Time and used oil analysis will tell. It certainly still meets the Ford WSS- M2C930-A spec. Conoco-Phillips appears to have made Kendall their flagship oil for now with Phillips 66, Conoco, and 76 being a step below Kendall. The MC branded oil is basically between these and Kendall.
If using MC 5W20 and changing at the manual recommended severe interval in regards to miles or every six months then you probably need to worry about something other then the oil in your engine. If you want extra measures of protection or what to extend change intervals (be that time or miles) there are other options to consider.Lonestar
It was a smile in every mile
Gotta love that American RideComment
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Re: Synthetic verses conventional motor oil
A synthetic blend is not a pure syntetic oil. It is a blend of regular base stock motor oil and a portion of synthetic additive added. Just check the price between the two.Originally posted by Lonestar View Post
O/K, already explained in previous posts.Last edited by snowbird; Jul 20, 2010, 03:57 PM.Comment
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Re: Synthetic verses conventional motor oil
I thought the reason for the synthetic was that it would last longer then conventioal oils if it starts breaking down at 5k I think I'll put my wife's monte carlo back on a standard motor oil and change at 10k lot cheaper I use a lab out of Co. that I send an oil sample every 20k on my commerical trucks and it comes back back oil totaly useable unless an engine problem dilutes the oil with coolant,fuel etc and these engines are under far more severe usage than these gasoline motors.Originally posted by Lonestar View PostBorn On February 14th 2002 Valentines Day!Comment
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Re: Synthetic verses conventional motor oil
I haven't done much reading the last while on Oils, is the US still the only place that allows group III oils to be marketed as "Synthetic"? If so does anyone in Canada know if they offer a Motorcraft "Full Synthetic"
Also is Mobil 1 still truly synthetic, I'm assuming Castrol still is group III, but I'm not up on who else is.Comment
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Re: Synthetic verses conventional motor oil
Originally posted by Treken View Post
I use it because synthetic oils reduce friction, and change it regularly because of mileage, not length of time, usually it is once, maybe twice a year...
As far as the milage increase, from what I have been reading, 4 to 16% increase but it depends on the vehicle and as ours was using a synthetic blend of sorts, can't see that happening...
My opinion is use Full Synthetics...
Never really wanted to buy synthetics in the past but this car I am keeping and if I can do less harm inside the engine the better...Comment
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Re: Synthetic verses conventional motor oil
I've been using 5W30 full synthetic since each of my birds have had 1,000 miles on them - not for the gas mileage but for the extra protection. I change the oil in them every spring - I know I'm throwing money away but I usually put a little under 1,000 miles on the cars a year.
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