SPG Gold is a free benefit from American Express Platinum so a lot of Head for Points readers will have one.
Reader Dr Phil chipped in with something even better – a link offering free Platinum status in the Sixt programme for Club Carlson Gold members. Club Carlson Gold is also an Amex Platinum benefit.
It isn’t just limited to Club Carlson Gold either. It also applies to (and this is just a sample, see the link below for the full list) SPG Platinum, Hilton Diamond, Etihad Gold, Emirates Gold, Flying Blue Platinum and Miles & More Senator.
The key benefits of Platinum and Gold are:
15% off car and truck rentals (10% for Gold)
An upgrade (not clear if guaranteed)
The middle two can be lifesavers when collecting a car at a crowded airport location.