I loved Sinclair when I was a kid and used to collect the plastic Brontos.
The Super Jet gas station in Gibbsboro where I grew up was a Sinclair for awhile.
I still have some quarts of Dinolene motor oil that I kept from my father's garage.
I went to Montana a few years ago to fish and tour...
TNative,
You may find this site helpful:
http://www.saltwatertides.com/dynamic.dir/newjerseysites.html#mana
I use it for fishing, clamming and crabbbing statewide.
Sweetwater is in there.
You can obtain data for any day of any year.