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I've owned alot of Amcs with the inline six.They always seem to prefer thicker oil.So now that I'm on the synthetic oil bandwagon,is Castrol edge 5w50 a good choice?

I Just got a nice 82 Eagle with 200000 on The clock.Its a auto and 258 carbed six.I'm wondering if I should use atf+4 in the trans and transfer case,and Delo 80w90 in the rear?

Should I dare use 5w20?In a 77 Dodge Aspen 318?My dads 61 Rambler 196 runs just fine on the stuff.

I just scored a 87 Caprice with a 305,I know these engines are known to eat cams.I was wondering if I should use a HDEO.

I have a 78 Concord with a 258 straight six that I drive daily.I'm currently using 5w30 and it runs really well.But I scored some 5w20 on sale last week and I'm due for an oil Change.Thoughts?

Just picked up a clean 78 Amc Concord with a 258.I want to run hdeo but am wondering if I should go with Rotella 5w40 Syn,10w30 semi syn,or 15w40,straight 30 conventional.Or possibly Delo 10w30?

I was at auto zone and noticed delo 75w90 rear diff oil was cheaper than all the conventionals..I was going to get some to change the fluid on the diff in my 82 Buick lesabre RWD..the guy atctge parts counter said it would be too thin..is this true?

Ok so the owners manual for my dads 83 delta strongly advise against 40wt oils...but my dad runs 10w40 in nearly everything with great results...I recently changed the oil on his 79 el Camino 350 to 10w40 wa defy..I also had some left over oil from previous changes so I mixed 3 quarts of Del0...

I traded my old Volare for a Clean 87 Mercury Grand Marquis with the Ford 5.0 non H.O roller...I just tuned it up and filled it with Castrol GTX HM 5w-30 and a Bosch filter...how long can i plan on using this combo?

Ok so I scored a bit of oil from my dad and work...in includes 1 quart shell formula clean 5w30 2 quarts delo 400 15w40 3 quarts pyb 10w40 1 quart western family 10w4 1 half quart chevron supreme 5w30 1 quart seven eleven 10w30 1 half quart carquest 10w30 Now with oil changes due for my Volare...

My Dad has a Fleet of Vintage Cads,aswell as my brother.One is a 66 with a 429 v8,the other is a 61 convertible with a 390 v8,and the last one is a 74 eldo conv.with a 500cid v8. Now my dad swears by Castrol GTX 10-40 and a STP filter and has been running it in his 74 for over a decade now,even...

I have a 78 Plymouth Wagon with a 225 slant six and a 2bbl carburator. i was thinking of running Shell Rotella synthetic because of the cylinder wall wash you get with carbed engines.I plan on using this as a daily driver.Am i right on track to use synthetic oil in the trans and rear axle also?