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how many miles on Synthetic?

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how many miles on Synthetic?

Old 06-29-2007, 06:17 PM
1st Gear Member
Join Date: Jun 2006
Posts: 102
Default RE: how many miles on Synthetic?

You are correct... Not sure what I was thinking on the 50/50 blend thing. [:@]

PDXStangDude is offline  
Old 06-29-2007, 07:53 PM
Join Date: Jan 2007
Posts: 956
Default RE: how many miles on Synthetic?

The reason Synthetic last longer than regular Crude oil.

I drew A description on paint and didn't use Sp Check sorry.
each one of the lines representsone oil molecule

Synthetic oiltakes longer to break down because there are many more of molecules. The same properties in a crude oil5W20 oil are in a Synthetic 5W20 oil , just lots more of them.
Synthetic oil and Crude oil has the same molecular stricture as far as atoms per molecule go, but, the crude oil is random in design, (nature) and synthetic is man made so it can be manipulated to hold more molecules in the same amount of space, And therefore oil with longer life.

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Old 06-29-2007, 09:23 PM
3rd Gear Member
Join Date: May 2006
Posts: 803
Default RE: how many miles on Synthetic?

Frequent oil changes are more important during the 1st 12,000 miles. I switched to synthetic and went 3,000 for the first few, now I shoot for 3,000, but I don't get around to it until 5,000, which is still probably overkill. As has been mentioned, it's the dirt, not the degradation, that will do you in. If a synthetic could be kept perfectly clean, it would probably be good for more than 15,000.
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Old 07-01-2007, 08:52 AM
Gene K
5th Gear Member
Join Date: Jun 2007
Location: Decatur AL USA
Posts: 2,176
Default RE: how many miles on Synthetic?

Actually some of the GIII based synthetics are very good. I dont see Ferrari having to much problem with the F1 cars. (Shell Helix Ultra is GIII based).

Right off the top of my head I cant think of any 5W-20 that meets SM GF-4 and doesnt contain some GIII. XL-7500 is the only Amsoil that meets this (A Ford requirement if you like your warranty). Mobil 1 was the last hold out of the mainstream synthetics. Alas this no longer seems to be the case. Pennzoil Platinum is no longer GV either. Now GIII. Although it appears to be Shell XHVI (Same basestock as Shell Helix Ultra).
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Old 07-01-2007, 09:15 AM
6th Gear Member
Join Date: Nov 2005
Location: Clarksville TN
Posts: 6,828
Default RE: how many miles on Synthetic?

Oil and filter is changed every 3000 miles.
1BAD3V is offline  
Old 07-01-2007, 11:21 AM
2nd Gear Member
Join Date: Jun 2005
Posts: 213
Default RE: how many miles on Synthetic?

I just changed mine after at least 7000 miles on it. The Mobil 1 was not as pretty as new, but still working hard. Now, I'm not working in Dallas anymore, so I will not be putting as many miles on the car. Thanks goodness!
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