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Old 08-03-2015, 05:31 PM   #1
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3.2k is really low. Keep your shifts between 4k-5k+. At about 5.5k, that engine really sings.
Even with that said, you should be getting better mileage.
My 2.5 gets roughly 20 city, 25+ highway, even on 91 octane.
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Old 08-03-2015, 05:36 PM   #2
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3.2k is really low. Keep your shifts between 4k-5k+. At about 5.5k, that engine really sings.
Even with that said, you should be getting better mileage.
My 2.5 gets roughly 20 city, 25+ highway, even on 91 octane.
On 6th gear going 65mph the RPM is around 2.5k. Should I be using 5th gear then?
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Old 08-03-2015, 05:43 PM   #3
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On 6th gear going 65mph the RPM is around 2.5k. Should I be using 5th gear then?
Yes; Listen to your engine and feel the pressure you are using on the throttle. The engine will communicate back to where it wants to run. You will have much better results. I have driven my 2.5 into So CAL down the 215 rarely using 5th gear and have gotten 32 calculated freeway. I believe you are so low in RPM the knock sensor is retarding the ignition timing. Try keeping at 3.2k +. I don't think your plugs are an issue since you just bought car so had to pass CA smog. Of course new plugs are always good.

PS; I used to have an air cooled 911 with weber carbs hat would load up below 3.5k. This was during the famous 55mph speed limit days. I used to have to shift constantly between 2nd and 3rd that car really hated that speed limit. Now at 90 Yahoo!

Last edited by 911monty; 08-03-2015 at 05:54 PM. Reason: anecdote
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Old 08-03-2015, 05:58 PM   #4
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how is your air filter / tire pressure?
The tire pressure is fine I checked it 2 days ago. I should probably change the filters though.

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Yes; Listen to your engine and feel the pressure you are using on the throttle. The engine will communicate back to where it wants to run. You will have much better results. I have driven my 2.5 into So CAL down the 215 rarely using 5th gear and have gotten 32 calculated freeway. I believe you are so low in RPM the knock sensor is retarding the ignition timing. Try keeping at 3.2k +. I don't think your plugs are an issue since you just bought car so had to pass CA smog. Of course new plugs are always good.
Damn I'm such a newbie lol. I've driven a manual car before but it wasn't a sports car and this my first car with manual. So I've been lugging my engine for like 3 weeks I hope I didn't screw things up too bad.
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Old 08-03-2015, 07:05 PM   #5
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Damn I'm such a newbie lol. I've driven a manual car before but it wasn't a sports car and this my first car with manual. So I've been lugging my engine for like 3 weeks I hope I didn't screw things up too bad.[/QUOTE]

Mike; I went and looked at your original posts and hopefully without starting a war I noticed you are aware of the IMS. There is lots of informative reading on this subject in here when you have time and popcorn. Jake Raby is a very knowledgeable resource. I hope he doesn't mind my referencing him but he has stated that the IMS has the most loading at low RPM. IMHO This is why there is a theory that engines that have been driven hard have less IMS failure than a garage queen, Lugged around engine. Hence the statement Drive it like you stole it! These cars love to rev! Their pedigree is racing. Get out and enjoy the way it was meant to be driven!

Last edited by 911monty; 08-03-2015 at 08:22 PM. Reason: second thought
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Old 08-03-2015, 07:23 PM   #6
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Thanks. I hope to get the IMS and clutch replaced as soon as I have the money. I had a mechanic tell me a LN and the pelican parts bearing both failed on him. I don't think I believe him lol.
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Old 08-03-2015, 08:22 PM   #7
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Mike there is something else that is bothering me about your thread. You say you have filled up once in 3 weeks and getting 16 mpg. That only works to a maximum of around 240 miles a week or around 10 miles a day. Are you only driving around 5 miles one way? Sorry I'm not trying to pry, but, short trips are also bad.
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