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Car Forum / Honda Cars / April 200797 Honda CX 40 mpg but burning oil?
Hi, I have a 97 Civic with 165k miles that seems to run strong and get good gas mileage. I do courier type work and have been getting 38 to 40 mpg. I do use a fair amount of oil, about a quart every 700-1000 miles, although I don't notice any smoke. Passed emissions three months ago. I haven't done wet/dry compression test yet but will soon. I guess my question is whether burning oil usually corresponds with lower performance or gas mileage? Do bad rings or seals just let oil in and then "seal" under the power stroke/pressure? Thanks for any ideas... Tim > Hi, I have a 97 Civic with 165k miles that seems to run strong and get > good gas mileage. I do courier type work and have been getting 38 to [quoted text clipped - 9 lines] > > Thanks for any ideas... Tim ===================================== Check your PCV. It's probably sucking out your oil (vapor) invisibly and burning it. Most folks recommend a Honda valve, but they are expensive. 'Curly' kratz7435@comcast.net wrote in news:1177670790.351970.289140 @r35g2000prh.googlegroups.com: > Hi, I have a 97 Civic with 165k miles that seems to run strong and get > good gas mileage. I do courier type work and have been getting 38 to [quoted text clipped - 7 lines] > lower performance or gas mileage? Do bad rings or seals just let oil > in and then "seal" under the power stroke/pressure? Excellent chance your rings are shot. Rebuild/replacement time. No smoke because the cat eats it up. Mileage unaffected because engine burns it as though it were gasoline. Power has been lost, but it happens so slowly you don't notice. Emissions unaffected because modern engine oils combust very cleanly, to protect the cat.  SignatureTegger The Unofficial Honda/Acura FAQ www.tegger.com/hondafaq/ > kratz7...@comcast.net wrote in news:1177670790.351970.289140 > @r35g2000prh.googlegroups.com: [quoted text clipped - 26 lines] > > The Unofficial Honda/Acura FAQwww.tegger.com/hondafaq/ Thanks for the info, I guess the compression test would tell for sure? I plan to put about 500 to 800 miles a week on it for the rest of the spring, summer, and into the fall. Unless something fails completely, I will probably run it up to timing belt replacement and then change out everything. Is rebuilding or replacing the block and head generally recommended?? >> kratz7...@comcast.net wrote in news:1177670790.351970.289140 >> @r35g2000prh.googlegroups.com: [quoted text clipped - 33 lines] > > Is rebuilding or replacing the block and head generally recommended?? rebuilding is simply uneconomic on a readily available commodity motor like this. buy a used low mileage japanese import engine and replace the whole assembly. much cheaper and more reliable. > kratz7...@comcast.net wrote: > >> kratz7...@comcast.net wrote in news:1177670790.351970.289140 [quoted text clipped - 40 lines] > > - Show quoted text - Thanks again, where do I shop for a motor? Online, at a junkyard, or a local engine remanufacturer? I think I called a "engine" place once and they wanted $3,000 which seems way to much. I generally like to shop local, online purchases this big always seem to go wrong, I am near Philly, PA. >> kratz7...@comcast.net wrote: >>>> kratz7...@comcast.net wrote in news:1177670790.351970.289140 [quoted text clipped - 35 lines] > shop local, online purchases this big always seem to go wrong, I am > near Philly, PA. search online for "jdm import motor". should be in the $300 to $500 range for your engine. i wouldn't bother with a domestic junkyard motor - it'll be much higher mileage and made here so maybe subject to the same quality issue you have. > Thanks again, where do I shop for a motor? Online, at a junkyard, or > a local engine remanufacturer? I think I called a "engine" place once > and they wanted $3,000 which seems way to much. I generally like to > shop local, online purchases this big always seem to go wrong, I am > near Philly, PA. --------------------------- Did you check the PCV ? ? It's only worth about $20 and might cut your oil usage by 75% 'Curly' >> Thanks again, where do I shop for a motor? Online, at a junkyard, or >> a local engine remanufacturer? I think I called a "engine" place once [quoted text clipped - 8 lines] > > 'Curly' agreed - check that first. >>> Thanks again, where do I shop for a motor? Online, at a junkyard, or >>> a local engine remanufacturer? I think I called a "engine" place once [quoted text clipped - 10 lines] > > agreed - check that first. I was thinking along the same lines that it is often a ventilation issue that causes a gradual increase in oil consumption particularly since 160K is not real high mileage for a Honda. OTOH, if there is a lot of stop 'n go, an engine will "age" faster. JT (Who wishes it was that simple on the $200 Civic turdbox...) On Apr 28, 2:53 pm, Grumpy AuContraire <Gru...@ExtraGrumpyville.com> wrote: > >> kratz7...@comcast.net wrote: > [quoted text clipped - 23 lines] > > - Show quoted text - Thanks for all the help, I looked for the PCV valve but couldn't find it offhand, even under the intake manifold. There just seemed to be standard hose connections. the manual I have is pretty unclear, nothing specific to my exact car. The PCV valve pics I have seen for this car are 90 degrees, I haven't seen anything on my car that corresponds with the pics. What I did find was a hose directly from the top of the valve cover into the throttle body, directly under the air filter. There is a oily trail from that connection down into the throttle. I didn't see any valve, there are two 90 degree hose connections( which were flexible, couldn't feel an internal vavle) and a metal tube. It looked stock but should there be a valve in between? On Apr 28, 2:53 pm, Grumpy AuContraire <Gru...@ExtraGrumpyville.com> wrote: > >> kratz7...@comcast.net wrote: > [quoted text clipped - 23 lines] > > - Show quoted text - I did find the PCV valve way up above the oil filter and cleaned it with carb cleaner, the "rattle" seemed to be smoother and louder so maybe it was clogged. I will check out the oil mileage this week.... thanks again. > I did find the PCV valve way up above the oil filter and cleaned it > with carb cleaner, the "rattle" seemed to be smoother and louder so > maybe it was clogged. I will check out the oil mileage this week.... > thanks again. =================================== You have to check it by blowing through it. It's supposed to allow a certain amount through one way, but none the other. If the spring is fatigued or broken (rusted to nothing), sure it will 'rattle', but not work. Walk into the dealer and ask them if you can compare a new one. 'Curly' > kratz7...@comcast.net wrote: > > I did find the PCV valve way up above the oil filter and cleaned it [quoted text clipped - 10 lines] > > 'Curly' Right, it allowed the carb cleaner one way only, I will give it a week or so and see what happens. Thanks... |
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