Trust me and just use regular. Subaru engines are an 87 octane rating and buying a higher rating will do nothing except waste ur money and is actually bad for any fuel injected engines that are an 87 octane rating. i could be wrong but but higher octane rated gas is for higher compressed engines, like muscle cars with big heads and such. Now if you have an older CARBURator engine, then a higher rating could be better if the engine is old and not running with the soul it used too! but this does not apply with fuel injected engines so follow your owners manual specs and just get a tune up or something jeez.
The 1998 Subaru Legacy requires regular gasoline without any additives. This vehicle is known to be fuel efficient and runs well on standard gas.
The 2002 Subaru Legacy runs on regular unleaded.
The 2012 Subaru Legacy runs on regular unleaded.
The 2004 Subaru Legacy runs on regular unleaded.
The 2009 Subaru Legacy runs on regular unleaded.
The 2001 Subaru Legacy runs on regular unleaded.
The 2005 Subaru Legacy runs on regular unleaded.
The 2013 Subaru Legacy runs on regular unleaded.
The 2010 Subaru Legacy runs on regular unleaded.
The 2007 Subaru Legacy runs on regular unleaded.
The 2014 Subaru Legacy runs on regular unleaded.
The 2008 Subaru Legacy runs on regular unleaded.