diff --git a/changelogs/current.yaml b/changelogs/current.yaml
index 8bc13de86f9d..9a777d79c5df 100644
--- a/changelogs/current.yaml
+++ b/changelogs/current.yaml
@@ -186,6 +186,9 @@ removed_config_or_runtime:
 - area: tls
   change: |
     Removed ``envoy.reloadable_features.enable_intermediate_ca`` runtime flag and lagacy code paths.
+- area: oauth
+  change: |
+    Removed ``envoy.reloadable_features.oauth_use_standard_max_age_value`` runtime flag and lagacy code paths.
 - area: http
   change: |
     Removed ``envoy.reloadable_features.use_cluster_cache_for_alt_protocols_filter`` runtime flag and lagacy code paths.
diff --git a/source/common/runtime/runtime_features.cc b/source/common/runtime/runtime_features.cc
index ff97705bdcde..a3da94fba541 100644
--- a/source/common/runtime/runtime_features.cc
+++ b/source/common/runtime/runtime_features.cc
@@ -66,7 +66,6 @@ RUNTIME_GUARD(envoy_reloadable_features_immediate_response_use_filter_mutation_r
 RUNTIME_GUARD(envoy_reloadable_features_no_downgrade_to_canonical_name);
 RUNTIME_GUARD(envoy_reloadable_features_no_extension_lookup_by_name);
 RUNTIME_GUARD(envoy_reloadable_features_normalize_host_for_preresolve_dfp_dns);
-RUNTIME_GUARD(envoy_reloadable_features_oauth_use_standard_max_age_value);
 RUNTIME_GUARD(envoy_reloadable_features_oauth_use_url_encoding);
 RUNTIME_GUARD(envoy_reloadable_features_original_dst_rely_on_idle_timeout);
 RUNTIME_GUARD(envoy_reloadable_features_proxy_status_mapping_more_core_response_flags);
diff --git a/source/extensions/filters/http/oauth2/filter.cc b/source/extensions/filters/http/oauth2/filter.cc
index dda635f73349..f8841ecf4619 100644
--- a/source/extensions/filters/http/oauth2/filter.cc
+++ b/source/extensions/filters/http/oauth2/filter.cc
@@ -670,12 +670,7 @@ void OAuth2Filter::onRefreshAccessTokenFailure() {
 void OAuth2Filter::addResponseCookies(Http::ResponseHeaderMap& headers,
                                       const std::string& encoded_token) const {
   std::string max_age;
-  if (Runtime::runtimeFeatureEnabled(
-          "envoy.reloadable_features.oauth_use_standard_max_age_value")) {
-    max_age = expires_in_;
-  } else {
-    max_age = new_expires_;
-  }
+  max_age = expires_in_;
 
   // We use HTTP Only cookies.
   const std::string cookie_tail_http_only = fmt::format(CookieTailHttpOnlyFormatString, max_age);
diff --git a/test/extensions/filters/http/oauth2/filter_test.cc b/test/extensions/filters/http/oauth2/filter_test.cc
index 5c889533ee3c..5cdbf0e18cd4 100644
--- a/test/extensions/filters/http/oauth2/filter_test.cc
+++ b/test/extensions/filters/http/oauth2/filter_test.cc
@@ -1793,46 +1793,6 @@ TEST_F(OAuth2Test, OAuthAccessTokenSucessWithTokensUseRefreshTokenAndNoExpClaimI
                                    std::chrono::seconds(600));
 }
 
-TEST_F(OAuth2Test, OAuthAccessTokenSucessWithTokens_oauth_use_standard_max_age_value) {
-  TestScopedRuntime scoped_runtime;
-  scoped_runtime.mergeValues({
-      {"envoy.reloadable_features.oauth_use_standard_max_age_value", "false"},
-  });
-
-  oauthHMAC = "/Dcdntz/d3PMuU4EQ4qdmxFRa3SSDds1OIoLN4TfnoM=;";
-
-  // Set SystemTime to a fixed point so we get consistent HMAC encodings between test runs.
-  test_time_.setSystemTime(SystemTime(std::chrono::seconds(0)));
-
-  // host_ must be set, which is guaranteed (ASAN).
-  Http::TestRequestHeaderMapImpl request_headers{
-      {Http::Headers::get().Host.get(), "traffic.example.com"},
-      {Http::Headers::get().Path.get(), "/_signout"},
-      {Http::Headers::get().Method.get(), Http::Headers::get().MethodValues.Get},
-  };
-  filter_->decodeHeaders(request_headers, false);
-
-  // Expected response after the callback is complete.
-  Http::TestRequestHeaderMapImpl expected_headers{
-      {Http::Headers::get().Status.get(), "302"},
-      {Http::Headers::get().SetCookie.get(),
-       "OauthHMAC=" + oauthHMAC + "path=/;Max-Age=600;secure;HttpOnly"},
-      {Http::Headers::get().SetCookie.get(), "OauthExpires=600;path=/;Max-Age=600;secure;HttpOnly"},
-      {Http::Headers::get().SetCookie.get(),
-       "BearerToken=access_code;path=/;Max-Age=600;secure;HttpOnly"},
-      {Http::Headers::get().SetCookie.get(),
-       "IdToken=some-id-token;path=/;Max-Age=600;secure;HttpOnly"},
-      {Http::Headers::get().SetCookie.get(),
-       "RefreshToken=some-refresh-token;path=/;Max-Age=600;secure;HttpOnly"},
-      {Http::Headers::get().Location.get(), ""},
-  };
-
-  EXPECT_CALL(decoder_callbacks_, encodeHeaders_(HeaderMapEqualRef(&expected_headers), true));
-
-  filter_->onGetAccessTokenSuccess("access_code", "some-id-token", "some-refresh-token",
-                                   std::chrono::seconds(600));
-}
-
 TEST_F(OAuth2Test, OAuthBearerTokenFlowFromHeader) {
   Http::TestRequestHeaderMapImpl request_headers{
       {Http::Headers::get().Path.get(), "/test?role=bearer"},