» Site Navigation | | » Recent Threads | looove 04-16-2024 01:18 PM 04-16-2024 01:18 PM 0 Replies, 1,113 Views | | lolita porn 04-13-2024 11:45 PM 04-13-2024 11:45 PM 0 Replies, 459 Views | lolita porn 04-13-2024 11:43 PM 04-13-2024 11:44 PM 1 Replies, 365 Views | lolita porn 04-13-2024 11:40 PM 04-13-2024 11:41 PM 1 Replies, 374 Views | lolita porn 04-13-2024 11:38 PM 04-13-2024 11:39 PM 1 Replies, 373 Views | lolita porn 04-13-2024 11:36 PM 04-13-2024 11:37 PM 1 Replies, 398 Views | lolita porn 04-13-2024 11:35 PM 04-13-2024 11:35 PM 0 Replies, 354 Views | lolita porn 04-13-2024 11:34 PM 04-13-2024 11:34 PM 0 Replies, 370 Views | lolita porn 04-13-2024 11:33 PM 04-13-2024 11:33 PM 0 Replies, 338 Views | | | | | 11-20-2014, 02:29 PM | #1 | Junior Member Join Date: Nov 2014 Location: Ann Arbor MI Posts: 1 | Octane reduction for 1998 & 1999 ? According to the US government mpg site, 1998 & 1999 318tis take regular, not premium gas, while getting about the same mpg. Does anyone know why there is a difference for those model years? For the owners of 98s & 99s, what do the owners manuals/gas fill stickers recommend? Do you have any issues running regular on a stock engine? Thanks! Michael | | | 11-20-2014, 03:47 PM | #2 | Senior Member Join Date: Jun 2003 Location: Greenville, SC Posts: 9,356 | As far as I know our cars take 89 octane. When I had my M44 I found mileage went down with 93. __________________ ...steven BMW CCA #146825 1996 BMW 328ti • 2003 MINI Cooper S • 2016 M235i www.bmwcca.org | | | 11-20-2014, 05:00 PM | #3 | Senior Member Join Date: Apr 2008 Location: Bethlehem, PA Posts: 1,106 | My 98 says to use 93 octane but I always used 89 and got excellent mpg. __________________ Check out our new website! https://soltechsolutionsllc.com/ Green Your Decor with the Aspect! Shop for the Grow Light Used by Interior Designers, Growers & People Like You! | | | 11-21-2014, 06:07 AM | #4 | Senior Member Join Date: Mar 2005 Location: Portland Or Posts: 2,666 | My 95 will run great on 87, makes power and gets great mileage till the outside air temps get above 70. Then I need 89, in 100 + degree weather its happiest with 92. YMMV __________________ Dave - PDX 1995 318ti - Active Black and Tan. 2005 330xi - Mtech 1 - 6spd - Orient Blue/Black | | | 11-21-2014, 03:34 PM | #5 | Senior Member Join Date: Jun 2003 Location: Greenville, SC Posts: 9,356 | Quote: Originally Posted by hotmilk400 My 98 says to use 93 octane but I always used 89 and got excellent mpg. | I wonder if they changed that during the year. I had an early build 98 and am pretty sure it was 89. But who knows? That was a long, long time ago. __________________ ...steven BMW CCA #146825 1996 BMW 328ti • 2003 MINI Cooper S • 2016 M235i www.bmwcca.org | | | 11-21-2014, 11:11 PM | #6 | Senior Member Join Date: Aug 2008 Location: Globally Posts: 1,162 | From owners manual my 99 says 89 octane for US spec car. It also says that on the gas cap, if premium was required it would say it on the instrument cluster. | | | 11-30-2014, 06:41 PM | #7 | Senior Member Join Date: Sep 2014 Location: Hawaii Posts: 114 | My 1998 owner's manual says minimum of 90 Anti-Knock Index (AKI) and I think USA using the Motor Octane Number (MON). The equivalent for 90 AKI to MON is 85, meaning it can use the regular unleaded (87). | | | 12-02-2014, 10:04 PM | #8 | Member Join Date: Apr 2009 Location: Lake in Wisconsin Posts: 67 | ...Unless you are using some sort of aftermarket chip that requires higher octane. | | | 12-03-2014, 12:13 AM | #9 | Senior Member Join Date: Dec 2007 Location: Gulfport, Florida Posts: 3,208 | Says 89 in my manual. I ran 87 on my stock motor with no issues. If the gas is so bad it causes "ping" the knock detectors will pick up that noise and the DME will retard timing until it runs ping free. You most likely won't ever hear a ping or know that your car is retarding timing. | | | | Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | | Posting Rules | You may not post new threads You may not post replies You may not post attachments You may not edit your posts HTML code is Off | | | |