how long can u go between oil changes?

Discussion in 'Fuel Economy' started by run500mph, Dec 5, 2008.

  1. run500mph

    run500mph Well-Known Member

    How long do you go between oil changes? I have heard about oil really lasting very long, even15000 miles??
     
  2. PaleMelanesian

    PaleMelanesian Beat the System Staff Member

    My manual calls for 7,500 miles between changes. (both civic and odyssey) I'm using synthetic, which lasts longer, so I go 10,000.

    10,000 is easy. Whenever there are 4 zeroes on the odometer, I change it. That's yearly for me.
     
    Last edited: Dec 5, 2008
  3. Blaster94

    Blaster94 Well-Known Member

    I change at 10000 mile intervals.
     
  4. mparrish

    mparrish Rosie the Riveter Redux

    Funny, just changed mine last night. Every six months, ~7500 miles. I think many here will have theirs checked in order to determine when to change? That sounds wise, although it certainly is easy to just mindlessly change twice a year.
     
  5. Tomjones76

    Tomjones76 Well-Known Member

    You can go 15K on Mobil 1 EP or high-end Amsoil with no engine damage.
    There are just a dozen caveats, and you basically have to have a daily usage cycle that happens to be 10 or 20 miles at highway speed with no trafifc jam.
    I ran my Mercury Sable for 23K on Mobil 1 EP 5W30 last year, and it still seems to run just fine. The radiator went out, much later, but that's a separate issue. The oil had darkened substantially, but it actually didn't look much different than it had at 7500 miles.

    One thing about hypermilers, though:
    Many of you turn off your engine when it's expected to be running, which means it doesn't spend as much time hot, which is effectively severe duty for the engine oil.
    If you don't [spend a solid 30 minutes with your ICE on and your load at highway levels] at least 2X per week, you'll have condensation in the oil, which leads to excessive oxidization.
    The excess oxidization can kill even a hearty synthetic oil over the long term, so in such cases you should use your automaker's "severe" schedule, not the normal schedule.
    It's perfectly possible to hypermile and not have excessive condensation, but if you don't live some distance from work, it's quite likely you DO have excessive condensation.
     
  6. Damionk

    Damionk DWL Lover

    My manual also says 7500. I have about 1500 miles before I am due. I have a nifty little indicator thing. No light or anything cool like that. Just a dial that changes from green to yellow to red when I reset it, when I hit 5000 and 7500 miles, respectively.
     
  7. PaleMelanesian

    PaleMelanesian Beat the System Staff Member

    I have the same. I ignore it. You can reset it by poking at it with your key.
     
  8. lamebums

    lamebums Member

    Whenever the oil doesn't look as clean as it's supposed to be. I check it every so often. I last changed it with synthetic at 93xxx, going to start looking for more oil when it hits 100k.

    I'll have enough Mobil1 0W-20 by picking them from the various Wal-Mart's and Auto Zone's (they never seem to have any in stock, or if they do they only have one or two at a time!) by the time I get to 105k.
     
  9. jhu

    jhu Well-Known Member

    My manual says 5k for the first 10k miles and 10k thereafter, so that's what I'm doing. VW spec oil is pretty expensive compared to the regular stuff.
     
  10. jhu

    jhu Well-Known Member

    What if you get the engine up to optimum temperature before turning off the engine? Would that still be considered severe duty?
     
  11. voodoo22

    voodoo22 Cheaper than the bus

    I've tried bringing up this point on other boards. Why do we in Canada have to change our oil every 8,000km's (4900 miles) or 6 months, in the US it's every 5,000miles or 6 months, but those in the UK do it every 10,000 miles or 12 months?

    Climate might vary a little between the UK and Canada, but you can't tell me a car in Toronto is driven in conditions much worse than one driven in downtown London or somewhere up north.

    According to the UK site for Toyota:

    All Toyota's require servicing at the following intervals:
    A major service every 20,000 miles, or 24 month interval with a health and safety check every 10,000 miles or 12 month interval.

    I've read before that Oil from cars is a huge pollution issue and hence the longer intervals vs North America, but someone somewhere has to be getting bad info, because 10,000 mile once a year intervals is much different than 5,000 miles or 6 months.

    If you look on the internet you will find that many countries have various "recommended" intervals. It feels like a scam to me.
     
  12. jhu

    jhu Well-Known Member

    The only real way to know is to do an motor oil analysis to see at what mileage the oil breaks down and becomes unacceptable as a lubricant.
     
  13. drimportracing

    drimportracing Pizza driver: 61,000+ deliveries

    @ 15K miles of delivery driving. 2x a year. - There is no more severe schedule. Except drag racing, but who would want to race guys in dresses? - Dale:rolleyes:
     
  14. Blackbelt

    Blackbelt Well-Known Member

    There is an interesting study on the net, here is the link
    http://neptune.spacebears.com/cars/stories/oil-life.html
    Some may find this interesting. I used to be of the school that 2000 miles between changes was about right. Then i moved that to 3,000. Now, i pretty much just go by the MFGR recommended intervals if my car is under warranty. I also have the changes done at the dealership. That way, there is no question that the oil was changed according to requirements, should there be any warranty claims. After the warranty expires, i prefer to go full synthetic, changed every 8-10K.
     
  15. lnmcmahan

    lnmcmahan Econoclast

    Using Mobil 1 5W-20 I went by the little oil change reminder on the dash. It told me to change at 18,000 miles. That was more than a year. I will probably change well before it tells me to next time.

    Larry
     
  16. diamondlarry

    diamondlarry Super MPG Man/god :D

    If I'm not mistaken, efusco had an oil analysis done at 12K(?)miles and it showed that there was still some life left in the oil. This was in a Prius. I figure that once the coolant temp gets up to the operating range that should take care of any moisture that would have condensed and, as long as the temp doesn't go terribly low, engine off coasting really isn't that severe of conditions.
     
  17. Tochatihu

    Tochatihu Well-Known Member

    There is a spreadsheet onPriusChat showing Prius used oil analysis results, but I'm not sure who (if anyone) has taken charge of keeping it up to date.

    Prius is easy on the engine oil, but there are probabaly lots of other modern cars are not much worse. CNC-cut engine parts are very accurate. As mentioned earlier, used oil analysis in *your* car is the best way to be sure.

    There is a specialist forum called BobIsTheOilGuy where questions like this are totally mainstream. Take a peek if you are considering extended oil change intervals.

    DAS
     
  18. msirach

    msirach Well-Known Member

    I go 25,000 miles/12 months with Amsoil synthetic and Amsoil filters per their spec.
     
  19. 99LeCouch

    99LeCouch Well-Known Member

    One, my changes are about every 7500-10,000 miles. Lots of highway miles, so probably could push it longer. It looked just fine at 7500 miles the last time.

    Two, BITOG is a useful site. If a bit addicting...
     
  20. Kacey Green

    Kacey Green Well-Known Member

    Before the Oil Life screen in my car reads 0%. I was at 50% when I parked today. I figure if its good enough for Honda... except I want to refill with synth
     

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