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Tech Question
Ken Sanderson, Oliver, BC, Canada, 72 Plymouth Duster 440
Greeting Rick. Last November I sent you a question about
cams. When I sent the e-mail I thought there would be a good chance I
wouldn't get a reply due to the volume of questions you must receive. To my
surprise not only did you reply, but the reply came the very next day. I was
very impressed with the quality of your answer. I have for some time now
enjoyed reading your responses to the many different kinds of questions
published in MOPAR ACTION. I would like to thank you for your valuable
service. Of course I would like to end with a question. This question is
about oil: I have always used 10W-30 engine oil in my vehicles. I have been
looking to buy a newer vehicle and have noticed that some manufacturers
recommend 5W-20 engine oil. Why would 5W-20 be preferred over a more viscous
oil like 10W-30. Also do you think that synthetic oil is worth the price.
THANKS Ken
Newer engines have become more precise, like Swiss wathces. Less clearances. Some mfrs. even recommend 0W-20! I'd use exactly what they recommend, especially for the 3 colder seasons. In hot weather, lots of high speeds, I'd throw caution ot the wind and use 10W-30 or 10W-40!
Synthetics are surely worth it. The question is: Do you run a realy, tue
synthetic, made from PAO base, like Mobil 1, or a cheaper "Group 3"
synthetic (most other common "store bought" brands). Answer: In my
super-high-power stuff, I use the M-1, which is what Chrysler uses as
factory fill in Vipers, in the old Shelby cars, etc. In everything else, I
use Wal-Mart's own brand of full synthetic, which is under $3/quart when
bought in a 5-qt. jug here in the states.
Rick
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