i read that you should use the narrowest viscocity range, because that means there are less fillers in the oil. ex..10-30 is better overall than 10-40 or 20-50
i'm pretty sure that's what i use, can't think right now....it should say right on your stock oil cap....most places will do it for like sixty bucks...that last one i did myself, sort of...and spent like forty bucks but i got a decent oil filter (K&N) so.....
You should be able to change your oil for slightly more than what a dealership will charge. That's a 6 pack case of mobile 1 5w-30 ($30-$35 and a subaru filter ($7-$170). Difference? More lubrication on your engine parts, less wear (theoretically)
another vote 4 mobil 1 syntec 5w-30... paid 30$ for 6 quarts + filter... prolly go heavier since its getting cold for the next one... Advantages??? Not sure, oil is still black as hell at 3000, but it makes me sleep better at night. More than likely it'll run better for the guy I sell it to in a couple years...
Mobil 1 synth. 5w30 is what I've got in it right now. I ran 15w50 for a bit before my tranny blew but didnt notice any difference.
lol nah dude, i think that "honor" would go to those who use royal purple BTW guys, i was under the impression that you use heavier viscosity in higher heat, not lower, reasoning being that the viscosity of a given weight breaks down as it heats up.
The chemical name for mobile one is acually Decene-1. They produce it by taking a long chain of decene in polymeric form and splitting off the monomers. This way you get nothing but decene-1, with no impurities or fillers. I know some of you are at tech, If you get the chance you should take a course with Dr. Stancell. He was a vice-president at mobile when they introduced mobile-one. The guy is a genius and a great professor. I don't think anyone on this board is chemical engineer, but Dr. Stancell does teach some sort of leadership class too. Anywho back to mobile one, since the oil so high purity, you get little build up in your engine. However I've been recommended to use a non-synthetic for my first 10K miles or so and then switch to mobile one. just my 2 cents.
thats what i thought too... ive been using 10-30 in my car all the time... dont think it gets cold enough here to go any thinner
I dont like to use any weight less than 10w on my STi, since i have an oil cooled turbo. When it was stock, it didnt like 5w-30 Mobil One and ate oil often. Even on 3k intervals. Last year I used mostely non-synth 10w-30 or 15w-40w in Summer, and a 10w-30w in winter. Changed pretty much 3k miles or less. No oil eating problems. When I get unlazy I will move to 20w-50 summer, and 10w-30w winter. Will get a case of redline for each.
Here's the rundown guys... here's a really good writeup on oil and viscosity http://www.micapeak.com/info/oiled.html note that some of these numbers are outdated and you should really go looking on teh mfr's sites for current #s (like i did below...) looks like amsoil might the better stuff on the market in the 5w30 range... according to the numbers on their respective websites(judging by viscosity index-what keeps the bearings happy, and flashpoint-the point at which the oil burns off higher numbers are better)...at least the two most important specs... 5w30 full synth oils... Mobil One Flash Point, ºC, ASTM D 92 230 Viscosity Index, ASTM D 2270 169 Amsoil Flash Point °C (°F) (ASTM D-92) 228 Viscosity Index (ASTM D-2270) 178 Royal Purple Flash Point °C (°F) (ASTM D-92) 235 D-2270 Viscosity Index 161 Redline Flash Point °C (°F) (ASTM D-92) 252 (<- i'm wondering if this # is helpful for the turbo though, since temps can get crazy high) Viscosity Index, ASTM D 2270 153 Although when you move up to 10x30, it's clear that redline has substantial advantage over the others... Flash Point °C (°F) (ASTM D-92) 250 Viscosity Index (ASTM D-2270) 170 royal Flash Point °C (°F) (ASTM D-92) 235 Viscosity Index (ASTM D-2270) 141 mobile Flash Point °C (°F) (ASTM D-92) 224 Viscosity Index (ASTM D-2270) 147 amsoil Flash Point °C (°F) (ASTM D-92) 234 Viscosity Index (ASTM D-2270) 174
It's starting to get really cold now. I think it is very important to use different viscosities depending on the weather. I know that it isn't that frequent here in the SE region, but if somebody lives in the mountains of GA, that might come in to play. Just my 2 cents... Mark
what depends on air temp? sanremo... if someone's using the stock 5w30, they're already running oil that was designed for very cold weather... now if they were going to run in extreme heat, then maybe something heavier would be called for (or at least something with a higher VI and flashpoint).