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Anyone familiar with VW VR6's?

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Old 04-03-2007, 08:03 PM
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If the factory recomends a minimum octane use it. They make the requirement based on the tune of the engine, the computer can compensate by pulling timing but only so much.

If the computer can not pull enough timing you risk cracking ring lands.
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Old 04-03-2007, 09:05 PM
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Our 01 Jetta VR6 needed premium.
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Old 04-03-2007, 09:07 PM
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If you put in regular it HAS to knock on it before it retards the timing advance.

Originally Posted by Jim W
Our 01 Jetta VR6 needed premium.
God that thing was clean.
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Old 04-03-2007, 09:10 PM
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No doubt it was a beautiful car. Its to bad we had to give it away after my dad passed away. I'd have assumed the payments, but couldnt afford 2 cars at the time.

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Old 04-03-2007, 10:01 PM
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Originally Posted by chr0mius
Midgrade is bs, I saw a study that showed there'* no noticable difference between 87 and 89, and 89 and 91. Just go with the top or bottom for the most noticable differences.
89 and 87 make the stark difference in terms of knocking for me... I'm too lazy to retard timing and lose power now that winter is over and it'* getting warmer (yes, I have a distributor) - where I used to knock like a bitch just trying to hold 70mph on a slight incline at 10 degrees C outside, I can practically floor it with zero knock. 2 octane points did it.

MPG study with the 89 octane coming soon.
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Old 04-03-2007, 11:26 PM
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Handdrumman is into V-Dubs. Not sure if he'd know....
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Old 04-04-2007, 09:46 AM
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i work on them all the time you need to use premium
had a van with 87 in it, ran 3 degrees of kr.
it had no power for somereason. we changed the fuel filter filled it up with a tank of premium and it ran good for some reason.
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