Playtime98 Posted February 11, 2004 Report Share Posted February 11, 2004 Did an oil change today. It was my first oil change on the Royal Purple. I changed it at 3000 miles but the length was probably 6-8 months. I was only going to change the filter and wait another 3000 before changing the oil. But after some investigation and talk, i ended up having to change the oil. The oil had a brown color to it as opposed to purple as i thought i would still be. I talked to the local Royal Purple dealer and he said that there would still be some old oil cycling through it and advised to change at 3000 and the next time it would come out still purple. The old royal purple i drained out turned from purple to a regular dark brown. But there was a semi-strong smell of fuel. Is this normal or does this indicate somethiing is wrong? Link to comment Share on other sites More sharing options...
Marika Posted February 11, 2004 Report Share Posted February 11, 2004 What kind of mileage do you have on your car? Do you see any smoke coming from the exhaust? If so, what color(s) is it? Describe how the car starts during a cold morning. Do you have to add oil in between changes? Can you smell fuel under the hood as well or just in the oil? Any codes being set? If you really want to make people safe drivers again then simply remove all the safety features from cars. No more seat belts, ABS brakes, traction control, air bags or stability control. No more anything. You'll see how quickly people will slow down and once again learn to drive like "normal" humans. Link to comment Share on other sites More sharing options...
KHE Posted February 11, 2004 Report Share Posted February 11, 2004 What is Royal Purple oil????? Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
Marika Posted February 11, 2004 Report Share Posted February 11, 2004 What is Royal Purple oil????? I'm assuming it's this: http://www.rpmoil.com/ I'm no oil expert. I use Quaker State 100% Synthetic in my 92 Seville SLS with no complaint. I'll leave the discussion of "royal oil" and its properties/quality to others on the board. Here's the MSDS on it: http://www.royalpurple.com/pdfsa/rpmoamsds.pdf If you really want to make people safe drivers again then simply remove all the safety features from cars. No more seat belts, ABS brakes, traction control, air bags or stability control. No more anything. You'll see how quickly people will slow down and once again learn to drive like "normal" humans. Link to comment Share on other sites More sharing options...
Dloch Posted February 11, 2004 Report Share Posted February 11, 2004 The old royal purple i drained out turned from purple to a regular dark brown. But there was a semi-strong smell of fuel. Is this normal or does this indicate somethiing is wrong? Yes this indicates there is something wrong and you need to find out what it is. When you get fuel in the oil it also washes the oil film off the cylinder wall in the process which has a tendency to glaze the cylinder walls. When the cylinder walls become glazed piston ring seal is compromised, not good. Generally with a EFI engine an internally leaking injector will continue too pass fuel after the engine is shutdown, or during running, it can't close during the off cycle which will pass fuel or in the case of a running engine extra fuel into that cylinder. While the engine is running it will burn off some of this extra fuel and the rest will go out the exhaust where the O2 sensor will pick it up as an overlyrich condition and pull the injector pulse back to bring the O2 reading into it correct range. The down side to this is that unless our motors/PCM are that smart they don't know which cylinder is the problem so it pulls the pulse from all the cylinders on that bank. Can you see where this is going? So now you have one or two cylinder that are the problem but the PCM pulls the pulse back on the whole bank, which now will lean out the cylinder that aren't having a problem which can lead to spark knock, lack of power........ Monitoring the BLM's (Block Learn Mode) will give an indication of which bank it is which will narrow the search. What is the BLM? BLM's are what the PCM uses to adjust the pulse width signal going to the injectors over time. It is generally only used to adjust the fuel table during WOT when the PCM isn't in closed loop control. A good BLM number that doesn't change the injector pusle width table is 128 for my Impala. I can't remember right now but to give you an idea how this is used to control the injectors is this; If the PCM determines that a bank of cylinders has an overly rich condition it will, over time, bump this number down. It will continue to do this until it gets the O2 sensor into the correct closed loop range. Bumping this number up or down adds or subtracts fuel from that bank of cylinders during WOT. As I said earlier, during closed loop the PCM will adjust the width based on the O2 sensor signal. With an injector it could be something stuck in the pintle, which is pulsed by the PCM to regulate the flow of fuel for a particular cylinder. Sorry this is so long... But you really need to find out what is causing this. Dennis Dennis Link to comment Share on other sites More sharing options...
cpk Posted February 16, 2004 Report Share Posted February 16, 2004 Any update on this? Link to comment Share on other sites More sharing options...
Adrian Posted February 16, 2004 Report Share Posted February 16, 2004 removed by user Link to comment Share on other sites More sharing options...
growe3 Posted February 16, 2004 Report Share Posted February 16, 2004 "...I changed it at 3000 miles but the length was probably 6-8 months.." It sounds like you rarely use the car. 3,000 miles in 6-8 months averages out to about 12-16 miles a day. The rich fuel needed for a cold engine can migrate into the oil, usually harmless as it is rapidly removed by the PCV in normal operation. You can get a rich condition in the oil by never getting the engine up to, and maintaining, full engine operating temperature for periods long enough to evaporate the excess fuel out of the engine. I would think your Oil Life Monitor would indicate changing sooner, due to your driving habits. -George Drive'em like you own 'em. - ....................04 DTS............................ Link to comment Share on other sites More sharing options...
Playtime98 Posted February 16, 2004 Author Report Share Posted February 16, 2004 Well, i stopped by the dealer the other day to pick up a car that was being serviced. And he told me that he thought it might be an injector problem. So i checked the new oil i put in ( less than a week old) and it smelled like fuel already. It's still under warranty, so I made an appt. for tomorrow. Will update more after i get it back. Link to comment Share on other sites More sharing options...
Playtime98 Posted February 19, 2004 Author Report Share Posted February 19, 2004 UPDATE Got the car back from the dealer, they said it was a bad FPR and replaced it. They didn't tell me why it was putting fuel in the oil. Does anyone know why a bad FPR would cause fuel in the oil? I also had the Rainsense sensor replaced. I thought it they might have used the wrong adhesive when they replaced my windshied, but it was the sensor itself. Trying to get anything that needs to be fixed befor my extended warranty runs out in July. Was very disappointed when i they wouldn't give me a rental, when the dealer guy told me that a rental would be included on any service work that takes 2 hours or more. The service guy at the same dealer told me that they say that just as a sales pitch. Link to comment Share on other sites More sharing options...
cpk Posted February 19, 2004 Report Share Posted February 19, 2004 I'm no expert on this, but here's my take. Get an oil change, run the car for a bit, and see if you still have fuel in the oil. If the regulator is malfunctioning there are a couple things that could happen. - It could be leaking at the diaphragm and allowing fuel to get into the vacuum line and thus the intake. - It could be sending too much fuel to the rails (and thus the injectors). - It could be sending too little fuel to the rals (and thus the injectors). (This probably isn't your situation) In all three cases, the problem would be experienced by all 8 cylinders more or less equally. The O2 sensors should attempt to compensate. If you have fuel in the oil due to an overly-rich condition, then the ECM should have figured out that the mixture is always way rich no matter what it does and set some sort of code. OTOH, individual leaking injectors don't set codes (to a point, if I recall), and they do result in fuel in the oil. Since the O2 sensor is shared by the entire bank of 4 cylinders, one cylinder can be running rich and the ECM will compensate to an extent. However, it compensates by running the others lean, which is bad. If the dealer's entire diagnostic routine was checking for codes, then they could potentially have overlooked the exact problem you went in there to have fixed. Its possible (some would say likely) that the regulator was bad or going, but that doesn't mean they fixed the original problem. I definitely wouldn't take the car on any long drives until you're sure the problem doesn't reappear. Just my opinion though... This whole post is based on the assumption that you weren't generating any codes. If you were, then its likely the dealer fixed the problem for you. Link to comment Share on other sites More sharing options...
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