I utilize my Race Ramps to avoid flat spots, or consider raising the PSI. Like mentioned, I too use the Battery Tender. For the last eight years I've used a product from from BND Automotive called ACES IV, with my modified LX, and now with the XF. This product has many beneficial performance factors, but more importantly a great fuel stabilizer. Definitely not a cheaper product, but I've used this with all my vehicles for almost a decade, and never looked back.