View Full Version : Oil question
05-18-2008, 04:42 AM
Hi, I don't know if this has been discussed before but I've been reading a lot about syn oil and understand that is the way to go. The FEH takes 5-20. I've read that 0-20 syn from Mobil is better than 5-20 syn from Mobil and would give better gas mileage. Any truth? What are the benefits and negatives of 0-20 syn as opposed to 5-20 syn? If Mobil doesn't make 0-20 syn any more who else does?
Thanks in advance.
P.S. I'm up to 34 MPG on average.:bananajump:
05-18-2008, 10:40 AM
amsoil makes a 0W30 that is believed by some to be the best lubricant in the world.
Right Lane Cruiser
05-19-2008, 08:50 AM
You should stick with whatever the second number is when trying different oils... or at least don't go up in number. Lone Ranger should stay with xW20
05-25-2008, 05:53 PM
Actually this brings up the oil additive issue. I have use TufOil in all my vehicles for years and it tends to add 2-3% gas mileage. Look this stuff up - it is in the Guinness Book of World Records as being the Slipperiest Substance Known To Man! I add 4oz at every oil change. There are semi trucks out there with over a million miles on their original engine from using TufOil. Trust me this is not your average oil additive. http://www.tufoil.com/
05-25-2008, 06:02 PM
I am always a little scared to try out oil and fuel additives, since there is so much snake oil out there. Amsoil has a a reputation of having extremely good products though. I have also seen pictures of the inside of a 200,000 mile engine that still looked new because the owner had used synthetic oil and maintained it properly. Problem with synthetic is that it sometimes causes oil seals to leak. I am trying it out in my old honda to see how it works.
Semi-trucks are not really the case you want for million mile engines. They get almost exclusively highway miles, are generally well cared for (in contrast to an average passenger car), and I am told that they commonly get 500,000 miles or better with no special treatment. A passenger car treated like this would probably do 300,000 miles plus without problems too.
___Your FEH is spec’ed for 5W-20 and thus Ford and of course Mobil1 all state you can use Mobil1 0W-20 as an even better and more fuel efficient substitute.
___Bowtie guy, Amsoil 0W-30 would be a step in the wrong direction with lower FE than a 0 or 5W-20 from Mobil1 and probably even Amsoil 5W-20 if they still offer 5W-20?
05-25-2008, 09:42 PM
Amsoil has 0-20w and I am running it in the Prius, HCHII, and Insight.
05-27-2008, 12:44 PM
I've always used Royal Purple 5W20 full syn - and I've never had a problem, but I've also not noticed too much in fuel economy or HP gain. I'm intrigued about the 0W20 Amsoil, and may try that - now that I'm hypermiler-conscious, and I may even try the additive - can't hurt, right?
Thanks for this forum, good info!
09-17-2008, 04:07 AM
I am considering the switch to synthetic oil and want to check to see if anyone has had experience with Synthetic oil in a 1995 Ford Ranger. I read elsewhere that some older vehicles have problems with synthetic oil damaging gaskets and such. Is it safe for my truck?
09-17-2008, 05:25 AM
Synthetic oil does not damage gaskets or seals. There is loads of info out there about this subject and Bobistheoilguy.com is one of them.
I have a 1996 Mazda B4000 4x4 which is the Ford Ranger with Mazda tags. It has the 4.0 and I changed to Amsoil Series 2000 0w30 at 102,000 miles. It's not driven much at all but there isn't any puddles or drips on the concrete. I'm changing the auto transmission and front and rear differentials to Amsoil synthetics this weekend.
As with everything I have driven, psi in the tires has been the biggest noticeable increase in mpg. I have 60 psi in the 31-10.50-15 Dayton Trailblazers and it will coast o.k.
09-17-2008, 08:56 AM
I've used Amsoil and Mobil1 synthetics in TorqueNada for over a year, still no leaks, no burning. I
09-17-2008, 09:02 AM
There's a lot of educated individuals on this site... AMSOIL 0w-20. No doubt about it. For tranny fluid (manual) contact Amsoil Tech Service Dept. and make sure u pick the right one.
The "0" just indicates it flows better at cold temps.
09-17-2008, 09:06 PM
We have a truck with a Cat 3406 in it with 1.4 million miles and as far as I know it is all original. No special oil tricks. The trannies do have synthetic in them though. It was a fleet truck.
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