This my second use of this product on Datsun/Nissan high mileage vehicles. Both times it has ended the delay of achieving oil pressure caused by bleed back out of the filter by installing the filter higher in a vertical position on the firewall. In both installations I have had to fabricate mounting brackets to clear other factory installed lines etc. I highly recommend this as a correction to the delay in achieving oil pressure. Plus it makes the filter access easy when oil and filter changes are made.