The Greylock Federal Credit Union is a auto loan from Greylock Federal Credit Union. The ongoing APR is as low as 8.14% APR (best tier). Typical credit limit: 100% of purchase price (tax and license included). Loan terms: campers/motor homes: +1% for up to 84 months, +2% for up to 120 months. Greylock will finance 100% of the purchase price (tax and license included) for: