Boostjunkie Posted July 4, 2006 Share Posted July 4, 2006 I've always broken-in thusly: drive gently, under 4k rpm so the ECU stays in closed loop as much as possible, but while varying speeds and load. Dump the factory fill at 1K miles. Then conventional oil changes at 2500, 4500, 7000. That makes for oil change intervals of 1500, 2000 and 2500 miles. Then switch to synthetic at the 10K mile oil change. From there either a 5K or 7.5K OCI depending on UOA results. Link to comment Share on other sites More sharing options...
bugblatterbeast Posted July 4, 2006 Share Posted July 4, 2006 thatwouldbegreat My friend uses the GC in his VW and I am planning on using it also(been a Mobil1 person for years). However, I just passed 1,100 on the odo. Since you seem to know quite a bit about "oils", wanted to ask for opinion. I know this question is a much debated topic. Can I use synthetic now..or must I wait till around 10k or so? I asked my shop foreman, says use it now is ok, and that the fact the rings have to "settle" in up to 10k miles makes no sense to him. Sorry for kinda going off topic 10K sounds a bit excessive. I just waited till the oil consumption became reasonable before switching to synthetic. When the car was new it burned through a liter in a few hundred KM. After about 4000 km the consumption dropped to ~100mL/1000km. I figured the rings were seated as the consumption had leveled off and my fuel economy had improved and wasn't getting much better. Link to comment Share on other sites More sharing options...
sframs Posted July 5, 2006 Share Posted July 5, 2006 if you extend the intervals 5k, 7.5k or 10k, how often do you check your oil to make sure you have enough? do you experience any burn in oil? Link to comment Share on other sites More sharing options...
thatwouldbegreat Posted July 5, 2006 Share Posted July 5, 2006 I run 7K OCI, and I always carry an extra quart. I check every few fillups, and I top off whenver it is down. With Redline the oil is almost never down, with Mobil 1 it may go down a few ounces, and with GC I can find the oil down 4 oz to 7 oz at about 3000 miles, so I top up. Link to comment Share on other sites More sharing options...
zed32 Posted July 5, 2006 Share Posted July 5, 2006 i just switched to GC 0w30 w/ a mobil 1 filter. haven't changed it yet, but will probably do it at 5k. is it much trouble to get UOA done? Link to comment Share on other sites More sharing options...
thatwouldbegreat Posted July 5, 2006 Share Posted July 5, 2006 i just switched to GC 0w30 w/ a mobil 1 filter. haven't changed it yet, but will probably do it at 5k. is it much trouble to get UOA done? 5K is still quite short...try an analysis and then you'll see that 7K + is fine. Free oil sample kit, $20 for the test if you send it in. Blackstone Laboratories - Free Test Kit Link to comment Share on other sites More sharing options...
AMBIVALENCE Posted July 5, 2006 Share Posted July 5, 2006 Hmm. just wondering. if i use synthetic oil do i have to use a different type of filter? or is the subaru "six star" standard filter enough? I dont know much about oil, moreover, i have a 2.5i. so it's hard for me to convert you guy's 2.5GT theory into use. Link to comment Share on other sites More sharing options...
deneb Posted July 5, 2006 Share Posted July 5, 2006 No you don't need a different filter, the OEM filter is fine no matter what oil you use. For a 2.5i, dino oil is just fine at factory specified intervals. Regular maintenance with dino will make your engine outlast the rest of the car, provided you drive sanely. Link to comment Share on other sites More sharing options...
AMBIVALENCE Posted July 6, 2006 Share Posted July 6, 2006 so as a 2.5i, i dont have to be as picky on oil as you guys because i dun have that turbo snapped beside the engine? Link to comment Share on other sites More sharing options...
deneb Posted July 6, 2006 Share Posted July 6, 2006 Well, I personally don't think one needs to be very picky about what oil we use for our turbos either. Use any quality SM dino for your 2.5i and rest easy. I recommend Chevron/Havoline, it's every bit as good as the Castrols and Pennzoils of the world but costs less. In reality though, any SM dino will be just fine. If you want to learn more, spend time at bobistheoilguy.com forums. Link to comment Share on other sites More sharing options...
ryoowatari Posted June 21, 2007 Share Posted June 21, 2007 I just came from the dealership and had my oil changed, at 12500 with Quaker State 10w-30, but the thing is, I am the 2nd owner, and the 1st owner had it changed twice with mobil 1 0w-40 at 3700 and 7500, but he was up in Nebraska, and I am down in houston, Texas. I was told by the maintenance guy that in the very hot weather, it's not a good idea to run 0w-40, and that 10w-30 at 3750 intervals is the best way to go. What does everybody think here? Link to comment Share on other sites More sharing options...
thatwouldbegreat Posted June 21, 2007 Share Posted June 21, 2007 I just came from the dealership and had my oil changed, at 12500 with Quaker State 10w-30, but the thing is, I am the 2nd owner, and the 1st owner had it changed twice with mobil 1 0w-40 at 3700 and 7500, but he was up in Nebraska, and I am down in houston, Texas. I was told by the maintenance guy that in the very hot weather, it's not a good idea to run 0w-40, and that 10w-30 at 3750 intervals is the best way to go. What does everybody think here? I think look for advice elsewhere. Subaru now wants turbo motor oil changes every 3750 miles. Look in you owner's manual and see if Subaru still prefers heavier oils in high temperatures or heavy loads. I would look for a good deal on a less expensive synthetic like Valvoline Synpower 5W-40 if you change every 3750 miles, or a thicker 5W-30 synthetic. Or maybe Shell Rotella Synthetic 5w-40. At the minimum use conventional oil like Castrol GTX 10W-40. Once I the car is out of warranty I think a premium synthetic like GC 0W-30, Elf Excellium Full Tech 0W-30, Redline 5W-40, Amsoil 5W-40 at 7000 mile intervals. Link to comment Share on other sites More sharing options...
ryoowatari Posted June 21, 2007 Share Posted June 21, 2007 its a 2005 Legacy GT wagon, and I probably put on 1000 miles a month, which is pretty average. So do you think i should make the switch back to synthetic, even if i'm changing out every 3750 miles? I don't mind paying for Mobil 1, but what do you think I should go for in this hot weather? My manual says this: 5W-30 used from -35F to 100F 10W-30 or 10W-40 used from 0F to 120F But in High Temperature areas like desert or for heavy duty operation like towing Subaru changes the oil specification to: 30, 40, 10W-50, 20W-40, 20W-50 Mind you, Houston is very hot and humid and in the summer, and in the winter very rarely does it freeze. We have very mild winters. Link to comment Share on other sites More sharing options...
pdw Posted June 21, 2007 Author Share Posted June 21, 2007 I think look for advice elsewhere. Subaru now wants turbo motor oil changes every 3750 miles. Look in you owner's manual and see if Subaru still prefers heavier oils in high temperatures or heavy loads. I would look for a good deal on a less expensive synthetic like Valvoline Synpower 5W-40 if you change every 3750 miles, or a thicker 5W-30 synthetic. Or maybe Shell Rotella Synthetic 5w-40. At the minimum use conventional oil like Castrol GTX 10W-40. Once I the car is out of warranty I think a premium synthetic like GC 0W-30, Elf Excellium Full Tech 0W-30, Redline 5W-40, Amsoil 5W-40 at 7000 mile intervals. I would add Motul and Mobil 1 0W-40 (not necessarily other Mobil 1's though). Link to comment Share on other sites More sharing options...
ryoowatari Posted June 21, 2007 Share Posted June 21, 2007 I just came from mobil 1 0w-40 synthetic though. Is it neccessary, or even detrimental in this hot weather? Link to comment Share on other sites More sharing options...
pdw Posted June 21, 2007 Author Share Posted June 21, 2007 I just came from mobil 1 0w-40 synthetic though. Is it neccessary, or even detrimental in this hot weather? I can't see why it would be worse than any other *w-40 oil. I use it year 'round and it's factory fill in Porsches. Link to comment Share on other sites More sharing options...
Boostjunkie Posted June 22, 2007 Share Posted June 22, 2007 I just came from mobil 1 0w-40 synthetic though. Is it neccessary, or even detrimental in this hot weather? The funny thing is that lots of people get confused or scared by 0w-xx oils. The first number only refers to the cold viscosity of the oil. The second number refers to the viscosity at operating temperatures. There is no downside to 0w-xx oils. They simply flow better at startup and reduce wear when you first start up the car. Link to comment Share on other sites More sharing options...
deneb Posted June 22, 2007 Share Posted June 22, 2007 As boostjunkie says, the 0-40 oil is thicker at operating temperature than 30 wt, it will be fine for pretty much any conditions your car will see. My only reason for not using M1 is the consumption issues my LGT seems to have with M1. Others here have seen pretty heavy consumption with M1, others have not. If you're sticking with 3750 mile oil changes, IMO a regular SM rated dino will be fine as well. Just follow the manual for the viscocity ratings and temperature, and you'll be fine. Link to comment Share on other sites More sharing options...
waverunner Posted June 24, 2007 Share Posted June 24, 2007 Amsoil 5-w30 every 4500 miles + amsoil filter. Link to comment Share on other sites More sharing options...
spect2k Posted November 3, 2007 Share Posted November 3, 2007 Which would you guys recommend for me running Mobil1 5W-30 and doing changes at around 6-7K: Mobil1 Extended Performance Filter or Subaru Stock Filter? Also, anyone have the number of the mobil1 filter? I went to the store, but they didn't have the book and I dont know which one it is....thanks! Link to comment Share on other sites More sharing options...
Ed_T Posted November 3, 2007 Share Posted November 3, 2007 #110 Quality synthetic easily goes the 7500/mile distance. It'll drain looking VG. Link to comment Share on other sites More sharing options...
Guest Gitster Posted November 3, 2007 Share Posted November 3, 2007 Wheres the poll ??? Link to comment Share on other sites More sharing options...
spect2k Posted November 3, 2007 Share Posted November 3, 2007 Which would you guys recommend for me running Mobil1 5W-30 and doing changes at around 6-7K: Mobil1 Extended Performance Filter or Subaru Stock Filter? Also, anyone have the number of the mobil1 filter? I went to the store, but they didn't have the book and I dont know which one it is....thanks! Link to comment Share on other sites More sharing options...
mach_six Posted November 3, 2007 Share Posted November 3, 2007 Got this from Mobil's website, it is Model M1-108, I put in my car's info so if yours not the same then try another one. Link to comment Share on other sites More sharing options...
spect2k Posted November 3, 2007 Share Posted November 3, 2007 Cool, i'll pick up a 108. I just hope these are worth the price for the value. The stock filters are obviously much cheaper, but for a long interval like 7-8K, i hope its worth the extra expense Link to comment Share on other sites More sharing options...
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