my dad tole me that because of the cool air in winter a high octane is not nescesary for cars thats use it. I didnt knw if he was right or wrong. Is he right or wrong or neithere?

 

wrong

 

haha

 

u got anything left of what ur dad is smoking???

 

An increase in ambient air temperature of 5.6C increases the octane requirement of an engine by 0.44 - 0.54 MON. When the combined effects of air temperature and humidity are considered, it is theoretically possible to use one octane grade in summer, and use a lower octane rating in winter. The Motor octane rating has a higher charge temperature, and increasing charge temperature increases the tendency to knock, so fuels with low Sensitivity ( the difference between RON and MON numbers ) are less affected by air temperature.

At most we are on the order of only a couple octane for an arbitrary temperature difference of say, 30 degrees Celsius (typical for the northern states, I'd say). If you factor in the use of average RON and MON for octane ratings here in North America (MON is typically higher), the effect of temperature is probably less than that.

Given that the USDM ITR is probably tuned for 91 or 92 octane (R+M/2), and that generally the pump ratings are based on a minimum octane grade (e.g. 89 is AT LEAST 89 R+M/2, if not higher ), I'd say that it's definitely within the realm of possibility that you could move down a grade in cold conditions. Especially since "most" drivers will "take it down a couple notches" in the winter when there is snow and ice around.

That being said, the price between grades is not all that much relatively speaking, so why not give yourself piece of mind if you can afford it, I use Ultra94 exclusively (93 when I travel in the states) myself and don't winter drive my R anyway... so, I guess you could take my post with a grain of salt. I'm only stating the factual information I'm privy to...

Your dad's advice is not as ludicrous as some may think... though my own R would never see octane in the 80's if I can help it...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by floatfisher &raquo;</TD></TR><TR><TD CLASS="quote">u got anything left of what ur dad is smoking???</TD></TR></TABLE>

 

Excellent explanation.

Now - is it worth the risk to save $40 over the course of 1 winter ($.20/gal x 10 gal/wk x 20 wks = $40)...Nope.

 

Cool

 

Noobie rhymes with Drewbie

enough said

 

Oh be nice to the guy. At least it was an interesting question that led to a worthy response from at least one person, thank you DC2fanboy. It was sure a helluvalot better than most of the questions that come up here. "What should I do to make my car go faster?" or "Should I do a JDM front conversion?" or even better "Can I do a 5-lug to 4-lug conversion?" :eyesroll:

 

tr00... guess this isn't too bad in comparison to some of the things we have read

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DC2fanboy &raquo;</TD></TR><TR><TD CLASS="quote">
Your dad's advice is not as ludicrous as some may think... though my own R would never see octane in the 80's if I can help it... </TD></TR></TABLE>

 

Haha... second thread about people putting in the wrong gas in their R... who else?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Doostur &raquo;</TD></TR><TR><TD CLASS="quote">Haha... second thread about people putting in the wrong gas in their R... who else?</TD></TR></TABLE>

ME ME ME, can i put diesel in my car??

 

you can go tell your dad: hey dad, you are ******* dumb!


use lower octan can mess up your R motor

 

god damn winter boost spikes! pissing me off

 

I find my car runs leaner in the cold i definetly wouldnt want any preignition at startup with cold parts. I can see rings galling up my cylinder walls or worse. Id say stick with the min you need. On highly tuned cars this could destroy them.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RTW DC2R &raquo;</TD></TR><TR><TD CLASS="quote">god damn winter boost spikes! pissing me off </TD></TR></TABLE>

bahaha

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RTW DC2R &raquo;</TD></TR><TR><TD CLASS="quote">god damn winter boost spikes! pissing me off </TD></TR></TABLE>

Ellaborate

 

all I know is that the "winter blend" is probably being phased in as I type this, which does not make me happy at all.

Winter blend = 20% drop in mileage for me

 

considering he lives in South Carolina, and there are actually 52 weeks in a year, with 4 seasons(at least in the USA), which would be 13 weeks for winter, but SC only sees about 10 of these, it would be about 20 bucks savings. Not worth it IMHO...I agree with the BUDMAN

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by drewbie &raquo;</TD></TR><TR><TD CLASS="quote">my dad tole me that because of the cool air in winter a high octane is not nescesary for cars thats use it. I didnt knw if he was right or wrong. Is he right or wrong or neithere?</TD></TR></TABLE>


you drive a STOCK SOHC vtackkkkkkkkkkkkkkkk powered hatch!!!!!!!!!

YOU DO NOT NEED PREMIUM fuel

neither do you ITR guys!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by chad &raquo;</TD></TR><TR><TD CLASS="quote">you drive a STOCK SOHC vtackkkkkkkkkkkkkkkk powered hatch!!!!!!!!!

YOU DO NOT NEED PREMIUM fuel

neither do you ITR guys!</TD></TR></TABLE>

When you buy a brand new car and roll it off the show room floor and it says "premium fuel only" you can be assured that's what I'm going to put in it.

My car doesn't NEED the factory recommended amount of oil to run either but I sure as heck feel a lot more comfortable with the right amount in there.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by chad &raquo;</TD></TR><TR><TD CLASS="quote">
neither do you ITR guys!</TD></TR></TABLE>

i drive a mere B16 and last time i put in regular gas, it sputtered and knocked. Screw that ****, and screw ur bad advice.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">you can go tell your dad: hey dad, you are ******* dumb!</TD></TR></TABLE>

You can go tell ur mom that she was great last night. *******

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DeadEnd9009 &raquo;</TD></TR><TR><TD CLASS="quote">

You can go tell ur mom that she was great last night. *******
</TD></TR></TABLE>

how original