Is high-mileage oil worth it over regular 5W-30?

If your engine uses oil, seeps at the seals, or has passed about 75,000 miles, the seal conditioners and stronger additive package are worth it. On a tight, low-mileage engine, a standard synthetic does the same job.

Can I use this in any car that takes 5W-30?

Yes, as long as your owner's manual specifies 5W-30 and the bottle carries the approvals your engine needs. Do not use it where the manual calls for a different grade.

How many oil changes does a six-quart case cover?

Most four-cylinder and V6 cars take four to six quarts, so one case covers a single change with some left over. Trucks and larger engines may need more than six quarts.

Will it stop an existing oil leak?

Seal conditioners can soften and swell dried seals, which slows minor seeps. They will not fix a torn gasket, a cracked pan or a worn bearing, so a real leak still needs repair.

Can I mix it with the oil already in the engine?

Topping off with a small amount of this oil is fine. For a full change, drain the old oil first rather than blending two different formulas.

How often should I change full synthetic 5W-30?

Follow the interval in your owner's manual, which is often 7,500 to 10,000 miles for full synthetic. Short trips, towing and dusty conditions call for shorter intervals.

Where is the 5w30 High Mileage Oil Case 6x1Qt Bottles cheapest?

At Amazon, for $34.98, as of our latest check.

Where can I buy the 5w30 High Mileage Oil Case 6x1Qt Bottles?

2 stores we checked sell it, including Amazon, JDR-Partsbarn and Sales.

5w30 High Mileage Oil Case 6x1Qt Bottles

Best price now

$34.98at AmazonChecked Nov 12

Prices are checked against each store and labelled with when. Store links may earn us a commission. As an Amazon Associate, Deal.ai earns from qualifying purchases.

Visit Amazon