Engine oil?

[94HeavyChevy]

Anyone hear of or used High Detergent 30 oil...i am supposed to use this in my car and cant find it...only thing i can find is Heavy Duty 30 or HD 30..is this the same? if not where can i find High Detergent 30?

[silicon212]

Originally Posted by 94HeavyChevy

Anyone hear of or used High Detergent 30 oil...i am supposed to use this in my car and cant find it...only thing i can find is Heavy Duty 30 or HD 30..is this the same? if not where can i find High Detergent 30?

Any oil of grade SG or higher will work.

[94HeavyChevy]

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

['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.

[96capricemgr]

Diesel oils will tend to do some cleaning if used in a dirty gas engine, many are dual rated for gas and diesel but only marketed towards diesel. I have use Rotella T "synthetic" 5w-40 just be prepared for the valvetrain to get a little noise after a few hundred miles and then change the oil filter. This is a "group III" "synthetic" meaning it is synthetic only as far as marketting is concerned, outside North America it can not be sold as synthetic as elsewhere that designation is reserved for group IV and V oils.

I know this technically does not follow the owner's manual BUT this very same engine sold for use outside the US and Canada was speced 15w-40, the 5w-30 thing is all about CAFE not necessarily what is ideal for the engine, not to say thicker is better either.

[94HeavyChevy]

Im thinking about switching to royal purple synthetic in at least 1 of my vehicles...what does anyone know about royal purple besides it being more expensive...i have heard only good things about it

[463]

good stuff,but in my oppinion the other syn oil is a better option dollar for dollar.

[96capricemgr]

Royal Purple is far more marketing than results, even far as results it is better for short term race use than the endurance you need in a street vehicle.

You want what is shown to be the best oil for an LT1 based on wear metal content of used oil from this engine, Castrol Syntec 0w-30 SPECIFICALLY labled "made in Germany" has for years shown the best most consistent results. Can be tough to find, try AutoZone.