Date: Wed, 23 Jun 2004 13:02:50 +0100 From: Grunff <grunffnospam.com> Subject: Re: [Saab_c900] When was APC introduced in the Saab 900's?
Craig's C900 Workshop wrote: > Here in Sydney (Australia) the local service station has, as of this week, > stopped selling lead-replacment petrol (aka LRP) and it's being phased out > by most oil companies in Australia over the next 12 months. > > BP, who supplies the service station I prefer to use, is now selling it's > newly-concocted 98 octane 'BP Ultimate' unleaded fuel out of the former > LRP pump. Since it's 'unleaded' it looks like I will need to start using > unleaded fuel additives in my two Saab 900's with B201 engines (1983 and > 1985 builds). I know a few people who run older cars (not Saab's) on ULP > and use additives for valve protection. Why? Why do the valves need protection? The alloy heads have steel valve seats. > I know that the 1980's where pretty much the transition period, at least > here in Australia, when cars changed from running on leaded fuels to > 'unleaded' fuels. When exactly did Saab start supplying 900's with APC, > and how do I tell if my two 900's have it? My 1985 900 has the later > version of the B201 block with the starter motor under the intake manifold > instead of under the exhaust manifold (my 1983 900 has the older style). > > If my 1983 900 has APC, it should run on higher-octane unleaded fuel > without a problem. LRP is 95 octane here in Australia, and standard > unleaded is around 93. Most of the newer high-tech fuel mixtures are 97 or > higher. I run all of my 900s on 95 octane unleaded. I occasionally use 98 octane on one of them (my fun T16). > What do others think? If the cars do have APC, are there any other things > which can be affected apart from the valves by running B201 engines on > unleaded fuels? Your valves won't be affected. The only cars you might get a slight problem on are the 8v turbos. All the 16v turbos will be fine (APC). All the non turbos will also be fine. -- Grunff