['97ventureowner]

Originally Posted by 94HeavyChevy

so i would be able to find this at a local auto store? any idea who makes it...valvoline, castrol, penzoil etc?

I think what silicon is trying to say is you don't have to use the HD30 oil, rather a good 10W30 (or other viscosity as spelled out in your owners manual as acceptable depending on operating temperatures) will work in your engine as long as the designation on the back of the oil container (see pic below) says "SG" or higher. The SG means that the oil meets the minimum standards set by the auto manufacturers for the protection packages within. Every time the standards are raised, a new designation is made, for example SG, becomes SH, then SI and so on. We are currently up to SM rated oil. It is advisable to use the most recent designation in your engine as it affords the best protection, and you can always "trade up to a higher designation, but you must never "trade down in lettering ( example if your engine's recommendation is to use SK oil, you can't use SJ, SI, SH and so on, or engine damage can occur.You can buy quality oil at any auto parts store or big box retailers among others by any major brand or store brand.
Here is the picture of what the API starburst logo on the back of the container looks like:

Notice this oil is rated SJ.