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Ok i have changed the oil using a K&N oil filter $ $11.04 @ farm and fleet. And it drank 7.5 quarts of oil (Pennzoil pla

Platinum) $5.49 x 8 quarts. It was da most costly oil change i ever did. I wanna know is this oil that great,overrated, or un appreciated? Also do yall/u suggest the K&N air filter n why? What difference does it make? & doed the non ethanol gas (even thougj it more costly run better (mpg) in the 05 GXP? Also what is the best fuel filter to use and its cost and where to Get it gone in Madison WI? & whats the best way to post to get a response? & Happy Holidays to u n yours ( Christmas & New Year)... Any ideas on improving mph (Lucas,STP , etc) what r the best plugs to use? & will it help my mpg? Im new here so help me if u can.

I also have done the full synthetic swap but with Valvoline. I didn't drive it enough before winter hit (parked for winter) so I didn't notice a change yet. I have the K&N air filter, but am swapping that out with a Volant CAI. Stay away from fuel additives IMO. Have a good Christmas!

Thanks for the advise.. Y stay away from the additives? (i tried lucas at least twice and it helped alot the fist time fron 14.6 to 16.3 mpg)& iplan on gettingthe k&n air filter i just dont knowif it will help anything.its $40+ so i would like ti know if it helps anything? Y swap da k&n fir the volant cvolantal & any suggest fuel filters n prices to change it ata shop?

First off, not to be mean, but to answer your question, the best way to post to get replies is to use full sentences and grammar, punctuation, etc. All that stuff you learned in high school english class. This isn't a text message.

First off: Pennzoil Platinum is a great synthetic motor oil, and run regularly, will help keep your engine in great shape. The K&N oil filter is also great, but at $13 apiece, the price isn't really worth any added benefits you may get. The best filters for the price to run with a good synthetic oil are Wix/NAPA Gold/Carquest (same filter, different stickers and boxes) and Mobil 1 filters. You should be able to find one of those at any auto-parts store in the country. The price is a lot better. NEVER USE FRAM OIL FILTERS.

Fuel filters don't really matter so much for brand, whatever your local store has behind the counter should be fine. I usually buy Wix, but that's just because they're available at parts stores local to me that I frequent. Great info on how to change the filter: http://www.pontiacbonnevilleclub.com/fo ... 23215.html Otherwise it's 15 minutes at a shop when they're changing your oil, or whatever else, so probably another $40 on your bill between the filter and labor.

As far as fuel goes, it really depends on what the price-per-mile is. If you save money or break even running the de-oxygenated fuel because you get better MPG's, go for it. If it costs more per mile to run it, then it's not really worth it.

As far as additives go: Are you really sure adding the cleaners helped, or was it more that you were driving more cautiously trying to get good mileage causing a placebo affect on you? Modern fuel has tons of additives in it already, so you're just dumping more money into your tank. I'll throw a can of something (usually Sefoam, Amsoil Performance Increaser or Gumout Regane) in my tank once a year or so, mostly to make myself feel better.

The biggest thing with a K&N filter is that it's re-usable, and you have to clean them occasionally, instead of going out every time and spending $15 on a paper filter, you spend $60 once on a K&N and spend $2/year or so on the amount of the cleaning kit you need. It's a long-term investment. Otherwise Amsoil sells their EaA filters that are rated for 4 years/100k miles of use, and then you throw them out.

He's putting on a Volant brand Cold Air Intake for performance, but the closest Volant kit is for the Cadillac DTS, so it's going to take a bit of modification/fabrication to get to fit.

Spark Plugs: Pretty much any brand's stock replacement will be fine. NGK, Denso, Autolite, AC Delco, Champion are all good brands. The plugs are a bitch to get at on these motors though, especially on the rear. They can help mileage if they're worn out, the OEM spec is to replace them at 100k miles.

Hope this helped. Merry Christmas to you too.

Thank you alot, and it did help. And i dont think u were being mean. I have been using my phone to post and its hard to edit on this site with this phone. I have a BA from UW Madison, so im not offended, because I was typing like it was a text message. So im glad to know that there is high standard in the Club. I will take your advise, have a great day.

Please keep your posts to single topics. Creating multiple duplicates per section is confusing for us. Most of us keep up in all of them, so no need to worry about that! I just replied to your thread (1 of 2) in Performance and Brainstorming before I saw this one, and realized that Ed had already done a good portion of it. Either way, my two cents:

7.5 quarts is correct. Personally I use a Wix (also sold as Napa Gold) filter, cheaper than the K&N and still one of the best on the market. Wix is also a good name to use for fuel filters. For oil, I also use Pennzoil Platinum, and have been happy with it. To be honest, as long as you're using oil that's up to GM standards (6094M or the 4718M high performance standard), it's hard to argue what's better. The PP does meet the hi-po 4718M standard, and in my area it is available at a better price than other options - it goes on sale more often.

Read this thread for thought: http://www.pontiacbonnevilleclub.com/fo ... 36694.html

As for the K&N air filter, personally I'm not a fan of the drop-in filters. The INTENSE Fenderwell Intake will do you better for not much more money: http://intense-racing.com/Merchant2/mer ... _Induction - all you need to do is to measure out the tubing you get and get an adapter that works with the MAF sensor tube. I don't have the numbers off hand. It is also a third of the cost of the Volant.

I have not known Ethanol (I assume you're talking about E85) to be of any benefit. Most gas may have up to 10% (E10), and I haven't been able to notice any gains or losses, power or mpg, when I run it.

Jerry; Each state has different laws concerning Ethanol in gas, I know MN allows non-oxygenated fuel to be sold for collector cars, snowmobiles, etc, and the rest has up to 10% Ethanol in it. I believe WI has something similar, that's what he's talking about. I would hope he's not running E85.

Yeah, I haven't even seen a single E85 station here in Ontario. It's generally accepted here that 87 is E10, 89 is E5, and 91+ is E0 with the exception of Sunoco/Petro Canada 94, which gets its octane rating from added ethanol.

When I had my '98 Aurora and then my '97 Cadillac Deville Concours (2007-2010), I found that gasoline adulterated with ethanol did indeed make a noticeable difference in fuel economy, to the tune of 3-4 mpg. It was worse on the Cadillac, which had a 300hp Northstar than it was on the Aurora with its 4.0 liter variant. Fortunately, I was able to get pure petroleum gas at BP stations back then, but now it seems every pump in N.C. has the "up to 10% ethanol" sticker on it. It really sucks because I just got a '95 Aurora and its fuel consumption is atrocious. The best I've gotten is 16 in town and 24 on the highway, which is about what I got with the Cadillac. My previous Aurora, which had California emissions, routinely got 18 in town and 28 on the highway on mid-grade fuel.

Hey guys hows everyone today! I'm going to throw my 2cents in if thats ok? I have been using Royal Purple oil and filter in the last few cars I've had and I change the GXPs oil just a week after I got it to Royal Purple its been working great but at $100 each oil change it does get a little pricey. As for fuel here in Columbus Ohio not all fuels have ethanol in them and going by what the manual say do not use fuels with ethanoll in it. It sounds like some of you cant avoid it. I went from Shell 89 & 93 to Sunco 89 & 93 with very good resaults, I've seen my mpg go between 18 to 25 on the hiway in towne 16 to 19mpg. Sorry for being long winded.

Royal purple is a HUGE waste in my opinion. These cars don't need nearly half the additives they put in that(for high rpms, high heat, etc). A regular brand synthetic should net you less than half the cost of the RP and change about 7k mile intervals.

If you have a $20k race engine, by all means use the RP.