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+--- Thread: Yet another oil discussion -- Best oil for Me. (/showthread.php?tid=6064)
- BLINGMW - 06-15-2007
I hadn't seen that article before, cool stuff. However, and they make it clear in the article, this is far from a complete picture. I'm not convinced that it's very useful. My first concerns....
1) wouldn't a heavier weight oil pretty much always beat a lighter oil in this test?
2) wouldn't this all be a bit more useful if the oil was tested again at like 250 deg? Unless I missed something (and I may have, I read over it quickly), I didn't see any mention of temperature control.
- Evan - 06-15-2007
my experience with oil.
Miata engine #1: ran it on track with castrol GTX. Also ran it inadvertendly with 26 degrees of timing detonating the shit out of it. Overheated the oil, damaged bearings. Oil would thin and oil pressure would waver but never got dangerously low. Compression was shit. Switched to castrol GTX high mileage. Oil pressure stopped wavering, and after usign it about a year, compression had actually improved.
Miata engine #2: Mobil 1 - no problems, good pressure.
Miata engine #3: Started out with GTX high mileage. Went to mid-ohio and oil pressure was really really low- around 30 psi at redline (after only 1 weekend on the oil). Seemed to be overheating? No pinging and timing was fine. Did an oil change to Mobil 1 at the track and oil pressure immediately went up and stayed up.
Karens camaro has 300k+ miles on an engine that has never been cracked open running on mobil 1.
ill stick to mobil 1, but i also may try the castol stuff sometime
- white_2kgt - 06-15-2007
Evan were the oil weights the same? I've been thinking about trying the GTX in the expedition but with shit like that and just having a factory oil pressure gauge (basically a switch) I don't want to risk low oil pressure when towing 8k lbs for 5hrs...
- Evan - 06-15-2007
yes, I always run 10w30 in the racecar.
keep in mind the GTX actually performed extremely well considering I was overheating the shit out of it by running 26 degrees of timing. I tracked it another 25 weekends after that and the motor was fine.
my only confusion is the poor results of the GTX HM at mid ohio. Ive always had very good pressure with that oil. There may be other factors there, my water temps were 230-240. Regardless of what the root cause of it was, Mobil 1 fixed the symptom. I wouldnt hesitate to put GTX HM in a street car or towing truck.
i need to find out what kind of oil the stealership put in my titan. when towing back from mid-o the pressure got lower than it usually does. it did have plenty of miles on the oil though.
- .RJ - 06-15-2007
Evan Wrote:Miata engine #1... Miata engine #2... Miata engine #3
A pattern? :lol:
- white_2kgt - 06-15-2007
.RJ Wrote:Evan Wrote:Miata engine #1... Miata engine #2... Miata engine #3
A pattern? :lol:
eh, he's only 1 ahead of me :lol: actually if you count number of pistons...
- D_Eclipse9916 - 06-15-2007
*cough cough* Royal Purple mass quanitity buy?
Also we can do the Mobil 1 for 4.99 a quart if someone wants to buy a few cases.
- Maengelito - 06-15-2007
oh yeah, the AAP discount... i'd be down with a group buy. can we get some prices for M1, RP and whatever anyone else wants?
- WRXtranceformed - 06-15-2007
Oh hi I'll definitely be in on a group buy for RP.
- CaptainHenreh - 06-15-2007
D_Eclipse9916 Wrote:*cough cough* Royal Purple mass quanitity buy?
What's the price/ qt?
- ScottyB - 06-15-2007
in my case, do you think the money saved from the mass buy would probably be offset by the cost of shipping some of it off to me in GA? otherwise i'd be in.
- SStratman - 06-15-2007
As for oil filters check out this little test of alot of the aftermarket brands, guy did a pretty thorough job on each filters specs, interesting article:
<!-- m --><a class="postlink" href="http://minimopar.knizefamily.net/oilfilterstudy.html#measure">http://minimopar.knizefamily.net/oilfil ... ml#measure</a><!-- m -->
Also as stated earlier in this post alot of the synthetics are good these days and if you even look up Supertech oil (yea the walmart oil) you will see that its generally looked at as a pretty good oil and is made by Pennzoil-Quaker State.
I personally have been using it (10W30) in my 96 Impala SS for quite a few oil changes and have had nothing to complain about it, no oil pressure changes or anything, and pretty hard to beat that price, but i also realize that some cars act more sensitively to different oils but my LT1 seems to like it just fine
- ViPER1313 - 06-17-2007
Volkswagen made my choice easy: Castrol 5w40 Synthetic (says so on the oil cap.)
10k mile oil changes FTW