All major brands meet API standards. Look on the bottle and it will state this.
Lower API crude requires treatment in high temperature and longer retention time to meet proper oil production specification Note - lower API (light crude) is free flowing while higher API (heavy crude) does not flow easily.
My 93 regency says 10w30 but 5w30 is what I would suggest if driving in winter conditions. As for the type, name brand is not important just look for the little round API certification label it should have an SM listed in it. If the oil is not API -SM certified do not buy it. An API certification of SM means that the oil meets all 2007 performance standards which are alot stricter than older standards.
Yes, as long as they both meet manufacturer specs, no issues.
All major brands of motor oil are manufactured to the same standards. To pick a best if impossible. But saying that Synthetic is superior to conventional oil.
All of them, I've bought it in California. It just has to meet the standards of that state.
In cold weather 5W30, 10W30 for warmer weather and make sure that It has the API badge saying it meets current SM standards.
No harm will come from topping off the oil level with a different brand. All oil manufacturers use a similar oil additive package. I would stick to one quality brand of oil. More important is using the designate API grade and viscosity.
Yes, as long as they are the exact same weight.
Manual trans. API GL-4 SAE75W90W or 80W90W gear oil Differential API GL-5 SAE 80W90W hypoid gear oil Transfer case API GL-4 or GL-5 SAE80W or 90W gear oil
15W-40 is the recommended weight, and it MUST be API CJ4 rated oil - gas engine oil will not suffice, nor will the API CI4 oil used for pre-2007 engines.
No. Select only engine oils that meet the American Petroleum Institute (API) certification. This should be listed on the bottle. 5w30 is recommended but you can also use 10w30 in warmer climates. This said synthetic oil is a better oil to use.
Supposed to be