buffer (bÅ­f'Ér) Chemistry A substance that prevents change in the acidity of a solution when an acid or base is added to the solution or when the solution is diluted.
These Ford Racing Performance Head Gaskets are specifically designed for use with cast iron or aluminum cylinder heads on a Ford 289, 302, 5.0L, or 351 Windsor V8 engine.
Premium gas has higher octane rating than regular. A VW Jetta should be run on premium as they're designed for it. Octane rating is the 'anti knock' rating of a motor.As the compression ratio is raised, so a motor tends to 'knock' or pre-ignite the cylinder charge.remium gas has higher octane rating than regular. A VW Jetta should be run on premium as they're designed for it. Octane rating is the 'anti knock' rating of a motor.