quick4dr Posted December 1, 2010 Share Posted December 1, 2010 im experiencing a bit of oil usage running 5w 30 royal purple, going into winter would swapping to 10w30 or a 5w40 help prevent or perhaps limit my oil usage. i do like royal purple but im open for change. ran it on my last car, 98 GTP zero oil usage 107,xxx Link to comment Share on other sites More sharing options...
450exc115 Posted December 1, 2010 Share Posted December 1, 2010 I run Rottela Syn in everything I own. WRX, wifes LGT, F250 diesel (cut 50/50 with Dyno), snow blower, dirt bike, pit bike, lawn mower, etc. Good stuff, cheap at walmart and comes in a gallon container. Link to comment Share on other sites More sharing options...
Mega Users seabass07 Posted December 1, 2010 Mega Users Share Posted December 1, 2010 Don't do a 10w30, it will make cold starts worse. A 5w40 or 0w40 may help with consumption. Link to comment Share on other sites More sharing options...
GTTuner Posted December 1, 2010 Share Posted December 1, 2010 What is your actual usage over a 3000 mile span? Link to comment Share on other sites More sharing options...
rage557 Posted December 1, 2010 Share Posted December 1, 2010 If you are losing oil from a leak there is not much you can do. Blow by in the piston rings may be improved by a heavier weight oil Link to comment Share on other sites More sharing options...
BAC5.2 Posted December 1, 2010 Share Posted December 1, 2010 I've heard EVOO works great in these cars. [URL="http://legacygt.com/forums/showthread.php/proper-flip-key-interesti-159894.html"]Flip Key Development Thread[/URL] "Genius may have its limitations, but stupidity is not thus handicapped." - E. Hubbard Link to comment Share on other sites More sharing options...
AShoe Posted December 1, 2010 Share Posted December 1, 2010 I've heard bad things about oil. I don't get any consumption with rotella synthetic 5-40 Link to comment Share on other sites More sharing options...
rao Posted December 1, 2010 Share Posted December 1, 2010 Subscribed. It is about time someone looked into what type of oil to use in these cars. Rob IF YOU CARE ABOUT YOUR CAR YOU SHOULD NEVER DRIVE IT Link to comment Share on other sites More sharing options...
Heedz Posted December 1, 2010 Share Posted December 1, 2010 im using 5w-30 motul Link to comment Share on other sites More sharing options...
jfg22557 Posted December 1, 2010 Share Posted December 1, 2010 Subscribed. It is about time someone looked into what type of oil to use in these cars. amen, finally someone ventures to seek the answer to the most unanswered non-subjective question on here. EDIT: ..... Link to comment Share on other sites More sharing options...
SCOBARU Posted December 3, 2010 Share Posted December 3, 2010 i usually use castrol gtx 5w-30 which is meant for turboed cars and meets all the standards on the oil cap, but ever since i started doing mods to it i just went to 10w30 gtx instead (higher rpms = more heat= thermal breakdown) Link to comment Share on other sites More sharing options...
ehsnils Posted December 3, 2010 Share Posted December 3, 2010 Continue to look over here too: http://legacygt.com/forums/showthread.php/clearing-up-all-oil-info-79800.html At least you may get additional links/information to chew on. As for modded cars - I would say going to a 5W40 is better than changing from a 5W30 to a 10W30 because changing to a 10W30 oil won't do any difference (or even make it worse) when the engine is warm. Link to comment Share on other sites More sharing options...
boymk123 Posted December 3, 2010 Share Posted December 3, 2010 subaru synthetic end of story.. Link to comment Share on other sites More sharing options...
peteyjr Posted December 4, 2010 Share Posted December 4, 2010 + 3 On Rotella oil. The only one I find that my Subies don't drink in gulps. Great oil for the $ Link to comment Share on other sites More sharing options...
johnAWD Posted December 4, 2010 Share Posted December 4, 2010 I use German Castrol Syntec 0w30 and Purolator Pure 1 filters. I'd been a Mobil 1 fan for a number of years until this car, which was the first one that consumed Mobil 1. The motor doesn't eat the Syntec. Link to comment Share on other sites More sharing options...
burnout8488 Posted December 4, 2010 Share Posted December 4, 2010 i usually use castrol gtx 5w-30 which is meant for turboed cars How do people even come up with this stuff? Link to comment Share on other sites More sharing options...
mwm5094 Posted December 4, 2010 Share Posted December 4, 2010 I use Mobil 1 Syn 0w-30 because I live in a cold climate and helps cold starts. Link to comment Share on other sites More sharing options...
SCOBARU Posted June 4, 2011 Share Posted June 4, 2011 How do people even come up with this stuff? by reading good sir, all of the ratings on the oil meet our cars specs and it clearly states for use in turbocharged cars but i was told by my tuner to use 10w40 because of the heat from the turbo causing thermal breakdown Link to comment Share on other sites More sharing options...
ehsnils Posted June 5, 2011 Share Posted June 5, 2011 Just be aware that viscosity isn't related to thermal breakdown. Link to comment Share on other sites More sharing options...
HAMMER DOWN Posted June 5, 2011 Share Posted June 5, 2011 ^^^+1 Amsoil 0w-30 SSO & Ea oil filters. rolled over 168k. Run it all year round. http://legacygt.com/forums/../images/smilies/eek.gifhttp://legacygt.com/forums/../images/smilies/cool.gif My OCI avg.15k Running Cobb stage1 93 map, max boost is still 16.2psi. Original motor & turbo are running like new. Mike Mileage:331487 Retired/Sold Link to comment Share on other sites More sharing options...
SCOBARU Posted June 7, 2011 Share Posted June 7, 2011 Just be aware that viscosity isn't related to thermal breakdown. in a way its somewhat related, higher viscosity means thicker oil which in theory will have a lower thermal breakdown rate as compared to a lower viscosity ex which is easier to boil water or honey? Link to comment Share on other sites More sharing options...
TheBoostNazi Posted June 7, 2011 Share Posted June 7, 2011 i usually use castrol gtx 5w-30 which is meant for turboed cars and meets all the standards on the oil cap, but ever since i started doing mods to it i just went to 10w30 gtx instead (higher rpms = more heat= thermal breakdown) OMG, I can die now. thanks for the laughs. Link to comment Share on other sites More sharing options...
ehsnils Posted June 8, 2011 Share Posted June 8, 2011 in a way its somewhat related, higher viscosity means thicker oil which in theory will have a lower thermal breakdown rate as compared to a lower viscosity ex which is easier to boil water or honey? Just because it boils doesn't necessarily means that it breaks down. Look at water - it's not breaking down into oxygen and hydrogen. The same goes for oil, but there are different types of oil - and even if it gets thinner when it's getting warmer one oil can go back to original state while another starts to reformulate itself when it gets heated. And that's not related to viscosity. You can have a thin oil that stands a very high temperature and a thick oil that starts to go really weird in lower temperatures. Link to comment Share on other sites More sharing options...
DirtyDan Posted June 8, 2011 Share Posted June 8, 2011 Viscosity and thermal breakdown are not related. Both are controlled with additives. When I got my Spec B it had Royal Purple in it, I couldn't get it out fast enough. It's not what they advertise. I also run Rotella 5w40 synthetic in everything, including lawn mowers and motorcycles. Link to comment Share on other sites More sharing options...
SCOBARU Posted June 8, 2011 Share Posted June 8, 2011 Just because it boils doesn't necessarily means that it breaks down. Look at water - it's not breaking down into oxygen and hydrogen. The same goes for oil, but there are different types of oil - and even if it gets thinner when it's getting warmer one oil can go back to original state while another starts to reformulate itself when it gets heated. And that's not related to viscosity. You can have a thin oil that stands a very high temperature and a thick oil that starts to go really weird in lower temperatures. learned something new today thanks for your input sir and as for theboostnazi glad to know i made someone laught today Link to comment Share on other sites More sharing options...
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