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Thanks for the info.

Thanks. Using Penzoil 5W30. Think I will change it every 1500-2000 miles.

Southeastern part of PEI. Murray River. 11 miles from the Wood Island ferry.

Thanks. Where can you buy ZDDP additive?

Have a 1973 Dart Swinger 318 63,000 orginal miles. When should the oil be changed? Been changing oil at 1000 miles.

Okay thanks. Since the car is stock except for the dual exhaust would like to leave it that way. It’s a great car. Just have to go on short road trips. LOL.

Never checked the timing yet. I did put new plugs and an air filter. Bought the car from original owner with 59,000 miles 3 years ago. I will check the timing thanks.

Thanks had a 1973 back in 1973 same car basically only I put a 4 barrel of a 340 on it and a set of headers thought I was getting better mileage but maybe not this one is stock.

323 gears auto trans 2 barrel carb dual exhaust stock cam. Everything is stock except dual exhaust.

17 mpg

Looking for ideas on making my 1973 Dart Swinger easier on gas. It’s a stock 318. Planning on doing a road trip and would like to increase gas mileage.

Thanks for the info. Back in 1973 had a Dart Swinger 318 but can't remember what year of the 340 intake I used. Anybody know where I would find one?

Have a 1973 Dart Swinger 318. Looking to put an intake of a 340 on it. Any ideas what year intake will fit.