What a cross reference chart does and why you need one
An oil filter cross reference chart matches the filter your vehicle's manual calls for with filters made by other manufacturers that will work in your engine. Your owner's manual lists a specific filter part number — say, a Fram PH3593A or a Mobil 1 M1-110 — but you may find a different brand at your local parts store, or you may want to compare prices across brands. A cross reference tells you which alternative filters have the same thread size, bypass valve setting, and internal dimensions, so they perform identically in your engine.
The chart is not a suggestion or a preference list. It is a technical match. A filter that cross-references correctly will fit your engine's mounting, handle your oil pressure, and filter the same micron size. Using a filter that does not cross-reference correctly can result in a filter that does not seal, leaks oil, or fails to open its bypass valve under pressure — all of which damage your engine.
Key Takeaways
- Your owner's manual lists a specific filter part number; a cross reference chart shows you which other brands' filters will work identically in your engine.
- The three manufacturers whose charts cover the widest range of vehicles are Fram, Mobil 1, and Wix, and all three publish free cross reference tools online.
- To use a chart, you need your vehicle's year, make, model, and engine size; the chart returns a list of compatible filters with part numbers you can price-compare.
- If your manual lists a filter you cannot find, search for that part number in a cross reference chart to discover which brands carry an equivalent.
- Some filters cross-reference to multiple options; all listed options are equally correct, and your choice comes down to brand preference and price.
Where to find cross reference charts online
Fram publishes a searchable cross reference tool at fram.com. Enter your vehicle's year, make, model, and engine size, and the tool returns Fram's recommended filter plus cross references to Motorcraft (Ford's OEM filter), Mopar (Chrysler's OEM filter), and Toyota OEM filters. The results show part numbers and a brief specification sheet for each option.
Mobil 1 hosts a cross reference at mobil.com/en/automotive/motor-oil/mobil-1. The search works the same way — year, make, model, engine — and returns Mobil 1 filters plus cross references to Fram, AC Delco (General Motors OEM), Motorcraft, and Mopar. Mobil 1's tool also displays filter dimensions and micron ratings so you can verify the match yourself.
Wix maintains a cross reference at wixfilters.com. This tool is the most detailed: it returns not only part numbers but also thread size, bypass valve opening pressure, and filter media type. Wix cross-references to Fram, Mobil 1, Motorcraft, Mopar, and Toyota OEM filters in a single result.
All three tools are free and do not require an account. If you know your vehicle's year, make, model, and engine size, you can get a result in under a minute.
How to search when you have your manual's part number
If your owner's manual lists a specific filter part number but you cannot find that exact filter in stock, search that part number directly into any of the three cross reference tools above. The tool will return all filters that cross-reference to that part number, even if it is not the tool's native brand.
For example, if your manual calls for a Motorcraft FL-400S but your parts store is out of stock, enter "FL-400S" into the Fram or Mobil 1 cross reference. Both will return a list of equivalent filters from other brands that you can order instead. This method is faster than entering your vehicle information again and ensures you are matching against the exact filter your manual specifies.
Some part numbers appear in multiple cross reference databases with slightly different results. If you see variation, check the specifications — thread size, bypass pressure, and micron rating — rather than the brand name. If the specs match, the filters are equivalent.
Understanding what the cross reference results mean
When a cross reference tool returns multiple filters, all of them are correct choices for your engine. The tool is not ranking them by quality or recommending one over another. It is saying: these filters all have the same thread size, bypass valve pressure, and filtration rating, so any one will work.
Your decision between them comes down to brand loyalty, price, and availability. Some drivers prefer OEM filters (the filter the manufacturer installed on the assembly line), which you can find by looking for Motorcraft, Mopar, or Toyota in the results. Others prefer aftermarket brands like Fram or Mobil 1 because they are cheaper or more widely stocked. Neither choice is wrong if the part number is in the cross reference.
One exception: if a cross reference result shows two different bypass valve pressures — for example, one filter opens at 10 PSI and another at 15 PSI — those filters are not equivalent. The bypass valve pressure must match. This is rare in cross reference results, but if you see it, verify the pressure against your manual before buying.
What to do if you cannot find a cross reference match
If you enter your vehicle information into a cross reference tool and get no results, or if you enter a part number and it does not appear in any database, the part number may be regional, discontinued, or specific to a particular market. Do not guess or substitute a filter from a different vehicle.
Instead, contact the filter manufacturer directly. Fram, Mobil 1, and Wix all have customer service phone lines and email support. Provide them with your vehicle's year, make, model, engine size, and the part number from your manual. They can tell you whether the part is still in production, whether it has been superseded by a newer part number, and what the correct cross reference is.
You can also contact your vehicle's manufacturer through their customer service line. Provide your vehicle identification number (VIN) and ask for the current filter part number. This is the most authoritative source and takes about five minutes on the phone.
Checking filter specifications to verify a cross reference
Cross reference tools are reliable, but you can double-check the match yourself by comparing three specifications: thread size, bypass valve opening pressure, and micron rating. All three must be identical.
Thread size is the diameter and pitch of the threads that screw the filter onto your engine. Common sizes are 3/4-16 UNF (most domestic cars), M20x1.5 (many imports), and M22x1.5 (some European vehicles). If the thread size does not match, the filter will not screw on or will cross-thread and damage your engine block.
Bypass valve opening pressure is the PSI at which the filter's internal valve opens to let unfiltered oil through if the filter becomes clogged. This is typically 10 to 15 PSI. If the bypass pressure is too high, a clogged filter will starve your engine of oil. If it is too low, the bypass opens too easily and unfiltered oil circulates. The pressure must match your manual's specification.
Micron rating is the size of particles the filter traps. Most automotive oil filters are 10 to 20 microns. If a cross reference result shows a different micron rating — for example, 25 or 30 microns — it is not a true match and should not be used.
All three specifications appear on the filter's packaging and in the manufacturer's spec sheet. If you are comparing two filters and all three specs match, the cross reference is correct.
Common mistakes when using cross reference charts
The most common error is entering the wrong vehicle information. Double-check your year, make, model, and engine size before searching. Your engine size is not always obvious — a 2015 Honda Civic might have a 1.8L or 2.0L engine depending on the trim level. Check your owner's manual or your vehicle registration to confirm.
Another mistake is assuming that a filter from the same manufacturer as your oil is the correct choice. Mobil 1 makes both oil and filters, but a Mobil 1 filter is not automatically the right one for your engine just because you use Mobil 1 oil. Always cross-reference against your manual's part number or your vehicle's specs, not against the oil brand you prefer.
A third error is buying a filter based on price alone without verifying the cross reference. A filter that costs half as much as the OEM filter may be for a different vehicle or may have a different bypass pressure. Always confirm the part number matches before checkout.
Frequently Asked Questions
Can I use any filter as long as it screws on?
No. A filter may physically screw onto your engine but have the wrong bypass valve pressure or micron rating, which will either starve your engine of oil or let unfiltered oil circulate. Always verify the cross reference before installing a filter you have not used before.
Do I have to use the exact OEM filter my manual lists?
No. Any filter that cross-references to your manual's part number will work identically. OEM filters are often more expensive than aftermarket equivalents, and there is no performance advantage to using the OEM brand if the cross reference matches.
What if the cross reference tool shows filters with different prices?
All filters in the cross reference results are equivalent, so price is your only deciding factor. Buy whichever brand is cheapest or most convenient to obtain. The filter performance will be the same.
Can I cross-reference a filter from a different vehicle year?
Sometimes. If your vehicle year is not in the cross reference tool, try entering a nearby year — one or two years earlier or later. Many vehicles use the same filter across multiple model years. However, verify the part number matches before buying; do not assume a filter from a different year will work.
What does "bypass valve" mean and why does it matter?
The bypass valve is a spring-loaded flap inside the filter that opens if the filter becomes too clogged to let oil through. If the valve opens, unfiltered oil flows to your engine to prevent oil starvation. The opening pressure must match your engine's design, or the valve will open too easily (letting dirt through) or too late (starving your engine). This is why bypass pressure must match in a cross reference.